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Onset of tetrahedral interstitial formation in GaAsN alloys Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 J. J. P. Cooper, T. Jen, A. Novak, Z. Xi, L. Qi, F. U. Naab, Y. Q. Wang, R. S. Goldman
N incorporation mechanisms in GaAs1−xNx alloys are probed using combined experimental and computational Rutherford backscattering spectrometry and nuclear reaction analysis angular yield scans. For xN < 0.025, in addition to substitutional nitrogen, NAs, (N-N)As, and (N-As)As split-interstitials are observed. However, for xN ≥ 0.025, evidence for N tetrahedral interstitials, Ntetra, emerges. We propose
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Unraveling of the Lindblad equation of N coupled oscillators into N independent ones Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 J. Moreno, A. Pendse, A. Eisfeld
We consider a system of N bi-linearly coupled damped harmonic quantum oscillators with time-evolution governed by a Lindblad equation. We show that the corresponding stochastic quantum state diffusion equation can be transformed into a set of N independent damped harmonic oscillators. This offers a great reduction in the basis size. We investigate the numerical performance of the method and find, in
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Resonant plasmonic terahertz photomixing using interdigital graphene micro-nanoribbon arrays Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 V. Ryzhii, M. Ryzhii, C. Tang, T. Otsuji, M. S. Shur
We analyze the generation of the terahertz (THz) radiation in photomixers using the interdigital graphene micro-nanoribbon (GMNR) array excited by modulated light or ultrashort radiation pulses. Replacing the standard metal electrodes by the GMNR array enables in the twofold advantages: an increase in the carrier generation efficiency due to the GMNR optical transparence and the possibility of the
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Particle levitation tensiometry (PLT) for probing interfaces of liquid–liquid phase separation systems (LLPSs) Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Diwen Wu, Siquan Wang, Lei Li, Si Meng, Cheng Qi, Tiantian Kong, Zhou Liu
We introduce a particle levitation tensiometry to accurately quantify ultra-low interfacial tensions in liquid–liquid phase separation (LLPS) systems, crucial for understanding the structure and dynamics of membrane-less organelles in biological cells. Our technique uses non-reactive spherical microparticles to balance gravitational and interfacial forces, providing precise, repeatable, and reliable
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Electric field-induced nonreciprocal spin current due to chiral phonons in chiral-structure superconductors Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Dapeng Yao, Mamoru Matsuo, Takehito Yokoyama
A recent experiment [Nakajima, et al., Nature 613, 479 (2023)] has reported a pair of oppositely polarized spins under an alternating electric current in a superconductor with a chiral structure. However, these behaviors cannot be explained by the conventional Edelstein effect and require a new mechanism. In this Letter, we propose a mechanism of spin current generation under an external electric field
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Improving AlGaN-based deep-ultraviolet light-emitting diodes: SiO2 passivation and size optimization for enhanced optoelectronic performance Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Zesen Liu, Jianhong Zhang, Jiandong Ye, Yating Shi, Jie Fu, Yiwang Wang, Weizong Xu, Dong Zhou, Feng Zhou, Rong Zhang, Hai Lu, Fang-Fang Ren
The authors investigate 275-nm AlGaN-based deep-ultraviolet (DUV) light-emitting diodes (LEDs) of varied dimensions (100, 150, 200, and 300 μm) with or without SiO2 passivation. The results indicate SiO2 passivation significantly enhances the emission intensity and external quantum efficiency in smaller LEDs (100 μm) by mitigating sidewall defects and non-radiative recombination. Conversely, SiO2 passivation
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Optically pumped stimulated emission in HgCdTe-based quantum wells: Toward continuous wave lasing in very long-wavelength infrared range Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 V. V. Rumyantsev, K. A. Mazhukina, V. V. Utochkin, K. E. Kudryavtsev, A. A. Dubinov, V. Ya. Aleshkin, A. A. Razova, D. I. Kuritsin, M. A. Fadeev, A. V. Antonov, N. N. Mikhailov, S. A. Dvoretsky, V. I. Gavrilenko, F. Teppe, S. V. Morozov
Amplified interband emission within the 14–24 μm range is investigated in HgCdTe-based quantum wells under optical pumping. Carrier lifetimes are shown to be marginally limited only by Shockley–Read–Hall recombination, fully realizing the advantage of relativistic energy spectra of 2D HgCdTe in terms of suppressing the Auger processes. By carefully optimizing the waveguides and mitigating carrier heating
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Improvements of readout signal integrity in mid-infrared superconducting nanowire single-photon detectors Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Sahil R. Patel, Marco Colangelo, Andrew D. Beyer, Gregor G. Taylor, Jason P. Allmaras, Bruce Bumble, Emma E. Wollman, Matthew D. Shaw, Karl K. Berggren, Boris Korzh
Superconducting nanowire single-photon detectors (SNSPDs) in the mid-infrared (MIR) have the potential to open up numerous opportunities in fields such as exoplanet searches, direct dark matter detection, physical chemistry, and remote sensing. One challenge in pushing SNSPD sensitivity to the MIR is a decrease in the signal-to-noise ratio (SNR) of the readout signal, as the critical currents become
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Super-bit-resolution enabled by noise-tolerant temporal single pixel imaging Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Ryota Keyaki, Susumu Fukatsu
Super-bit-resolution implies the survival of data that could have been lost beyond the digitizing bit resolution. This yet unexplored ability to beat the bit threshold of output readings has been achieved by making temporal ghost imaging (TGI) virtually noiseless. To this end, acquired immunity against self-inflicting noise was granted by implementing orthogonalized illumination in one-time readout
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Electrical control of metal–insulator transition and magnetism in asymmetric multiferroic InCrX3 (X = S, Se) monolayers Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Yangyang Wu, Lei Cao, Guannan Li, Xiaokun Huang, Bingwen Zhang, Benling Gao, Guang Song
Electrical control of conductivity and magnetism in two-dimensional (2D) ferroelectric (FE) materials have attracted immense attention due to their fascinating properties and potential applications in designing field-effect transistors and high-density multistate data storage. Based on first-principles calculations and crystal field theory, we present an approach to obtain 2D intrinsic asymmetric multiferroics
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Optical realization of magneto-intersubband oscillations Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 M. L. Savchenko, A. A. Bykov, A. Shuvaev, A. K. Bakarov, A. Pimenov, O. E. Raichev
We report on the optical realization of the magneto-intersubband oscillations that have been measured in the sub-terahertz transmittance of a GaAs quantum well with two subbands occupied. Following their dc analogue, the oscillations are periodic in the inverse magnetic field with the period governed by the subband gap. Their magnitude and polarization dependence accurately follow the presented simplified
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Qualitatively and quantitatively predicting the front velocity in binary reactive systems Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Fabian Schwarz, Ralph Spolenak
Reactive multilayer systems, due to their fast and highly localized heat release, are widely applied in various technologies. To tailor their properties to specific applications, there is still a lot of ongoing research on the engineering and prediction of their reaction properties. In this work, the focus is going beyond multilayers to binary Al/Ni reactive systems. Based on molecular dynamics (MD)
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Terahertz magnon excitation in antiferromagnetic domain walls based on mass-energy equivalence Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Xu Ge, Peng Yan, Wei Luo, Shiheng Liang, Yue Zhang
The theory of special relativity is one of the most significant achievements in modern physics, with several important predictions such as time dilation, size contraction for a moving object, and mass-energy equivalence. Recent studies have demonstrated size contraction for an antiferromagnetic (AFM) domain wall (DW). Here, we show the excitation of terahertz (THz) magnons from a moving AFM DW under
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First-principles prediction of thermal conductivity of bulk hexagonal boron nitride Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Ziqi Guo, Zherui Han, Abdulaziz Alkandari, Krutarth Khot, Xiulin Ruan
Despite its importance, a sophisticated theoretical study of thermal conductivity in bulk h-BN has been lacking to date. In this study, we predict thermal conductivity in bulk h-BN crystals using first-principles predictions and the Boltzmann transport equation. We consider three-phonon (3ph) scattering, four-phonon (4ph) scattering, and phonon renormalization. Our predicted thermal conductivity is
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Ferroelectric capacitors with triple level cell storage capability at low operating voltage by introducing TiN interlayer Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Yi-Fan Chen, Hung-Yuan Shih, Chen-Hsin Wang, Chun-Yi Kuo, Yung-Hsien Wu
Inserting an ultrathin TiN interlayer into a ferroelectric HfZrOx (HZO) film of 10 nm by in situ ALD was proposed to implement ferroelectric capacitors (FeCAPs) in this work. The FeCAPs with the structure of TiN/HZO/TiN/HZO/TiN show a high remanent polarization (2Pr) of 32.6 μC/cm2 at a low operating voltage of 2 V and a pulse width of 5 μs. Compared to those without TiN interlayer, this work shows
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Precisely tunable and predictable index-near-zero modes across continuous and broad bands Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Panpan He, Yun Shen, Sanshui Xiao, Lujun Hong, Yun You, Kosmas L. Tsakmakidis, Yamei Luo, Jie Xu
In the past two decades, index-near-zero (INZ) modes and materials, with their spatial phase invariance and super coupling, gained increasing attention for applications in all-optical/quantum computing and communication. However, the modulation of INZ modes is typically complex and discontinuous, often achieved through intricate experimental methods, thereby hindering their widespread application.
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Enhancement of TN induced by magnetic dilution in the linear magnetoelectric Mn4Nb2O9 Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Antoine Maignan, Christine Martin
Ferroelectric polarization induced by the magnetic field is one of the properties reported in honeycomb antiferromagnetic linear magnetoelectrics (LME) belonging to the A4M2O9P3¯c1 class of corundum compounds with A = Co, Fe, and Mn and M = Nb or Ta. Among them, Mn4Nb2O9 exhibits the highest TN of 108 K. We show that it can even be increased by substituting partly Mn by Fe. The study of Mn4−xFexNb2O9
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An energy-band modulated p-GaN/InGaN/AlN p-channel MESFET with high ION/IOFF ratio and steep subthreshold swing Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Huake Su, Tao Zhang, Shengrui Xu, Hongchang Tao, Yuan Gao, Xu Liu, Lei Xie, Peng Xiang, Kai Cheng, Yue Hao, Jincheng Zhang
In this work, we report on the high-performance p-GaN/InGaN/AlN multi-heterostructure p-channel metal–semiconductor field effect transistors (MESFETs) with energy-band modulated quantum well-like InGaN channel and low work function metal tungsten (W) as the gate material. A negative threshold voltage (VTH) of −0.35 V is achieved by precisely controlling the self-aligned etching depth at the active
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Complementary optoelectronic interaction of n+-Si/p-Ge heterojunctions fabricated via transfer printing toward broadband photodetectors Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Pingling Lin, Qinglei Guo
Heterojunctions have been recognized as promising candidates for the fabrication of broadband photodetectors. However, currently demonstrated heterojunctions suffer from one or more disadvantages in limited light absorption, incompatible fabrication with the current semiconductor technology, and/or abundant interface defects induced by lattice/thermal mismatches. In this work, we use traditional elemental
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Far-gate synaptic transistors utilizing ion-charge dual-transfer mechanism for neurotransmitter-multiplexing temporal coding Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Xi'an Li, Yanyan Feng, Lei Shi, Jianlin Zhou, Yao Ni
The ability of artificial synapses to replicate multiplexed-transmission is a significant advancement in emulating complex brain activities. However, it generally required more stringent material requirements of intrinsic-ambipolarity and more complex structures of P/N dual-channel. Here, we proposed a far-gate synaptic transistor (FGST) just using a single-channel composed of a common unipolar semiconductor
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Enhanced controllable triplet proximity effect in superconducting spin–orbit coupled spin valves with modified superconductor/ferromagnet interfaces Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-16 A. T. Bregazzi, J. A. Ouassou, A. G. T. Coveney, N. A. Stelmashenko, A. Child, A. T. N'Diaye, J. W. A. Robinson, F. K. Dejene, J. Linder, N. Banerjee
In a superconductor/ferromagnet hybrid, a magnetically controlled singlet-to-triplet Cooper pair conversion can modulate the superconducting critical temperature. In these triplet superconducting spin valves, such control usually requires inhomogeneous magnetism. However, in the presence of spin–orbit coupling from an interfacial heavy metal layer, the singlet/triplet conversion rate and, thus, critical
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Observation of energy localization in nonlinear non-Hermitian systems Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-16 Lei Dong, Dong-Yan Chen, Qing-An Huang
Energy localization in Hermitian systems has been utilized to generate ultra-sensitivity. Here, we report the interplay between non-Hermitian parity-time (PT) symmetry breaking and the mode localization transition. In our scheme, a PT-symmetric system consists of two coupled LC (inductor–capacitor) resonators: one has a linear loss and the other has a saturated gain described by a nonlinear model.
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Carrier tunneling and transport in coupled quantum wells: Modeling and experimental verification Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-16 Fuyi Cao, Zhan Su, Cong Wang, Yuhao Chen, Guoen Weng, Chang Wang, Xiaobo Hu, Hidefumi Akiyama, Junhao Chu, Shaoqiang Chen
We propose an approach to elucidate carrier dynamics by developing a robust rate equation model capable of explaining carrier dynamics in a dual-well system. To experimentally validate the accuracy and reliability of our model, we utilized a combination of time-resolved photoluminescence and spatially resolved cathodoluminescence measurements. The integration of these complementary techniques allowed
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Thermodynamic stability and ionic conductivity in lithium–germanium binary system Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-16 Anastasiia V. Iosimovska, Alexey P. Maltsev, Ilya V. Chepkasov, Artem R. Oganov
Lithium–germanium binary compounds are promising anode materials for secondary lithium-ion batteries due to their high capacity, low operating voltage, and high electronic conductivity of lithiated Ge. For their successful application in batteries, it is essential to know the temperature stability of different Li–Ge phases and the variation of their ionic conductivity depending on the operating temperatures
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Exploring the influence of the contact resistance on perovskite phototransistors Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Lijian Chen, Quanhua Chen, Hong Zhu, Runfeng Wang, Yiping Wu, Run Li, Li Zhu, Guangan Yang, Xiang Wan, Xing Zhao, Zhihao Yu, Binhong Li, Chee Leong Tan, Huabin Sun, Yong Xu
Organic–inorganic hybrid perovskites are widely used in photodetection owing to their high optical absorption coefficients. A variety of research has been conducted on perovskite phototransistors and their optoelectronic properties, but the exploration of the influence of contact resistance remains limited. In this work, we employed the transmission-line method to separate the contact resistance Rc
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Ultrafast self-transportation and efficient separation of organic droplets on semi-conical asymmetric structure Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Yi Yang, Qinrui Zou, Hesong Ren, Yuan Wang, Xiao Yao, Chenghong Guo, Lijie Zhuo, Yuanchong Xu, Yuegan Song, Kefeng Xiang, Guoqiang Li
Manipulating oil droplets in an aqueous solution is highly desirable for organic multiphase liquid separation. Despite substantial works in the realm of organic multiphase liquid manipulation and separation, the ultrafast transportation and efficient and precise separation of these liquids, especially those with varied surface tensions, encounters significant challenges due to little driving forces
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Photonic crystal-coupled enhanced steering emission: A prism-free, objective-free, and metal-free loss-less approach for biosensing Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Seemesh Bhaskar, Weinan Liu, Joseph Tibbs, Brian T. Cunningham
Diagnostic assays utilizing fluorescent reporters in the context of low abundance biomarkers for cancer and infectious disease can reach lower limits of detection through efficient collection of emitted photons into an optical sensor. In this work, we present the rational design, fabrication, and application of one-dimensional photonic crystal (PC) grating interfaces to accomplish a cost-effective
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A flexible thermal-coupled InGaZnO adaptive synapse Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Mingtao Xu, Haotian Long, Chuanyu Fu, Huiwu Mao, Changjin Wan, Qing Wan
The development of neuromorphic sensory systems necessitates synaptic devices with adaptivity to a wide range of stimuli. Furthermore, the introduction of multimodal adaptivity is highly favorable, which holds immense potential for improving the processing capability of the neuromorphic system under complex environments. In this work, we report a thermal-coupled adaptive synapse (TCAS) by integrating
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Predicting thermal transport properties in phononic crystals via machine learning Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Liyuan Dong, Wei Li, Xian-He Bu
Although anisotropic phononic crystals (PnCs) could be utilized to control the phonon dispersions and thermal transports, rapidly discovering their properties presents a significant challenge due to the enormous consumption of traditional computational methods. In this study, we have developed machine learning techniques to forecast the thermal conductance of anisotropic PnCs (GPnC and GPnC/Gmem) based
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Switchable Faraday laser with frequencies of 85Rb and 87Rb 780 nm transitions using a single isotope 87Rb Faraday atomic filter Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Xiaomin Qin, Zijie Liu, Hangbo Shi, Zhiyang Wang, Xiaolei Guan, Tiantian Shi, Jingbiao Chen
In the development of atomic physics, laser sources with Frequencies corresponding to atomic transition and high stability are essential. The Faraday laser is a special diode laser using the Faraday anomalous dispersion optical filter (FADOF) to realize frequency selection, so the output laser frequency is automatically limited to the atomic Doppler broadening. However, the frequency of a Faraday laser
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Excellent sodium metal deposition enabled by three-dimensional porous structures with natrophilic Ni-Sn alloy Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Xiang Sun, Xia Wang, Lixiao Xiang, Yunfei Wang, Yuanhao Wang, Na Li, Wei Deng, Wenhua Yang, Shandong Li
Na metal has long been an ideal potential anode material for sodium secondary batteries due to its own superiority; however, the Na dendrite problem during cycling makes it face a great obstacle in application. Here, we grow sodiophilic thin film materials with tin and nickel-tin components uniformly on three-dimensional nickel foam (3D-Ni) to obtain a 3D sodiophilic composite framework (namely 3D-NiSn)
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Probing rotated Weyl points on one-dimensional sonic crystals Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Xu Zhang, Chengxin Deng, Yiqin Yang, Jin Li, Yingjian Yu, Hai Yang
Recently, researchers have devoted their intense efforts to investigating Weyl physics in synthetic space. In this Letter, we study the intriguing topological rotated Weyl physics in a three-dimensional parameter space, which consists of two extra structural parameters and the wave vector of a simple one-dimensional sonic crystal. In our ultrasonic experiments, we observe that the topological interface
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AFM-IR study of interfacial nanostructures in high-temperature dilute nanocomposites Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Wenyi Zhu, Guanchun Rui, Maxwell Turner Wetherington, Jongcheol Lee, Seong H. Kim, Q. M. Zhang
The dilute nanocomposite strategy facilitates a promising route for high-temperature polymer dielectrics to achieve high dielectric constant and energy density, robust breakdown strength, and low loss. The dielectric enhancement of the dilute nanocomposites strongly ties to the topological conditions of the nanofiller–polymer interface. Here, atomic force microscopy-based infrared spectroscopy was
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Influence of interposed graphene sheets on mechanical and electronic properties of Al/graphene superlattice Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Jong-Hyok Jang, Kum-Chol Ri, Song-Jun Kim, Sin-Hyok Jon, Chol-Jun Yu
Graphene-reinforced aluminum matrix composites have drawn remarkable attention in several fields of high-tech industries, but the understanding of their material properties remains unclear. This work reports a first-principles study of interface binding nature, mechanical strength, and electronic properties of aluminum/graphene (Al/G) composites using superlattice models as varying graphene content
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Deep field-of-view and passive tomography based on Airy light field Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Siyuan Wang, Zonglin Guo, Yu Zhao, Yanbo Pei, Hongyan Shi, Jingbo Zhang, Jian Wang
We introduce a passive tomography method with deep field of view up to 90 m based on the self-acceleration characteristics of Airy beams. A post-modulation long-distance imaging system was proposed and optimized in its optical configuration and phase modulation parameters. The resolution was analyzed based on theoretical simulation. Experimentally, three LEDs at various distances around 10 m and two
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High ODMR contrast and alignment of NV centers in microstructures grown on heteroepitaxial diamonds Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Jan Engels, Jürgen Weippert, Tingpeng Luo, Jan Kustermann, Patricia Quellmalz, Niklas Mathes, Lukas Lindner, Christian Giese, Lutz Kirste, Peter Knittel, Jan Jeske, Vadim Lebedev
Heteroepitaxial chemical vapor deposition is the most promising option to fabricate wafer-scale monocrystalline diamonds for quantum applications. Previously, we demonstrated the feasibility to manufacture functional micrometer-sized pyramids on as-grown heteroepitaxial diamond as well as their quantum optical characteristics. Due to high background signals and microfabrication challenges, these pyramids
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The stability analysis of In–Ga–ZnO thin film transistors with polyimide substrates based on Maxwell–Wagner effect Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Zongchi Bao, Bin Liu, Xianwen Liu, Shuo Zhang, Le Weng, Haoran Sun, Xi Zhang, Qi Yao, Guangcai Yuan, Jian Guo, Ce Ning, Dawei Shi, Feng Wang, Zhinong Yu
Flexible organic light-emitting diode display devices fabricated on polyimide (PI) substrates have more obvious residual image problems due to the abnormal threshold-voltage (Vth) shifts of a thin film transistor (TFT). In this paper, the Vth shift of TFT fabricated on a PI substrate was analyzed. We explained the worse bias stability and worse recovery of TFT with a PI substrate compared with TFT
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Perpendicular magnetic anisotropy in permalloy ultrathin film grown on RuO2(101) surface Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Yunzhuo Wu, Yongwei Cui, Tong Wu, Ke Pei, Haoran Chen, Hongyue Xu, Wentao Qin, Tianping Ma, Renchao Che, Zhe Yuan, Yizheng Wu
Permalloy (Py) films are commonly regarded as soft magnetic materials, wherein the magnetization aligns within the film plane. Our studies reveal the presence of perpendicular magnetic anisotropy in Py thin films deposited on the collinear antiferromagnetic RuO2(101) surface. By employing both the magneto-optical Kerr effect and the anomalous Hall effect, we identified the interfacial origin of the
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Nano-kirigami/origami fabrications and optical applications Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Yingying Chen, Xiaowei Li, Lan Jiang, Yang Wang, Jiafang Li
Emerging nano-kirigami/origami technology enables the flexible transformations of 2D planar patterns into exquisite 3D structures in situ and has aroused great interest in the areas of nanophotonics and optoelectronics. This paper briefly reviews some milestone research and breakthrough progresses in nano-kirigami/origami from the aspects of stimuli approaches and application directions. Versatile
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Surface-state-related carrier dynamics of GaAs determined by UV-visible pump-probe terahertz spectroscopy Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 D. Zhai, E. Hérault, F. Garet, J.-L. Coutaz
The surface velocity and the bulk lifetime of photo-excited free carriers in GaAs were measured using an optical-pump and THz-probe time-domain technique. By varying the pump laser photon energy from 1.56 to 4.15 eV, we observe that the surface velocity drops abruptly from 0.7×106 cm/s down to 0.2×106 cm/s at 2.5 eV, while the bulk lifetime remains almost constant. We tentatively explain this step-like
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Femtosecond laser-textured superhydrophilic coral-like structures spread AgNWs enable strong thermal camouflage and anti-counterfeiting Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Tingni Wu, Kai Yin, Jiaqing Pei, Yuchun He, Ji-An Duan, Christopher J. Arnusch
Modulating the thermal emission of a material in the infrared (IR) range can be essential for various practical applications such as smart textiles, camouflage, and anti-counterfeiting. Although many different materials or structures have been proposed, the complex manufacturing processes are still hindering their widespread use. Herein, a facile femtosecond laser processing technology and a drop-coating
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Thick crack-free {113} epitaxial boron-doped diamond layers for power electronics—Deposition with nitrogen addition and high microwave power Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Mahebub Alam, Pavel Hubik, Zuzana Gedeonova, Ladislav Fekete, Jaromir Kopecek, Andrew Taylor, Vincent Mortet
In this work, first, we investigate the effect of nitrogen addition in microwave plasma enhanced chemical vapor deposition on the growth of thick {113} epitaxial diamond layers. We identify a narrow range of nitrogen concentrations for the growth of crack-free thick epitaxial layers with a smooth surface morphology. Without nitrogen, cracks start to appear after a layer thickness of 7–10 μm due to
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Acoustic and optical phonons in quasi-two-dimensional MPS3 antiferromagnetic semiconductors Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Dylan Wright, Zahra Ebrahim Nataj, Erick Guzman, Jake Polster, Menno Bouman, Fariborz Kargar, Alexander A. Balandin
We report the results of the investigation of the acoustic and optical phonons in quasi-two-dimensional antiferromagnetic semiconductors of the transition metal phosphorus trisulfide family with Mn, Fe, Co, Ni, and Cd as metal atoms. The Brillouin–Mandelstam and Raman light scattering spectroscopies were conducted at room temperature to measure the acoustic and optical phonon frequencies close to the
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Write error rate analysis of field-free spin-orbit torque switching in conically magnetized free layer nanomagnet Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Pinkesh Kumar Mishra, Swapnil Bhuktare
Enhancing the performance of magnetic random access memories (MRAMs) is crucial, considering speed, energy efficiency, and endurance. Spin-orbit torque-based MRAMs offer ultrafast operation and enhanced reliability. Still, the energy efficiency and external magnetic field requirement for deterministic switching of nanomagnets with perpendicular magnetic anisotropy (PMA) are a significant hurdle. To
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Experimental demonstration of complex four-wave mixing processes with pump of orbital-angular-momentum superposition mode Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Xiaozhou Pan, Sheng Yu, Kai Zhang, Jietai Jing
Orbital angular momentum (OAM), characterized by a topological charge ℓ (ℓ integer), serves as a promising vehicle for carrying quantum information. Generating a nonclassical field involving two or more OAM modes can largely enhance the data-carrying capacity of quantum information processing. In this Letter, we present the implementation of a four-wave mixing (FWM) process, featuring a pump beam of
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Synthesis and resistive switching performance of lead-free double perovskite Cs2AgBiBr6 films Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Fanju Zeng, Yongqian Tan, Wei Hu, Xiaosheng Tang, Haifeng Yin, Tao Jing, Lianshuai Huang, Yi Yang, Juan Liao, Changmin Zhou
In recent years, the lead-free double perovskite Cs2AgBiBr6 has emerged as an appealing alternative to lead-based perovskites due to its nontoxicity and long-term stability. In this study, we employed methyl acetate as an antisolvent and prepared high-quality Cs2AgBiBr6 films by a facile one-step spin-coating method. The prepared films exhibited excellent crystallinity with densely packed crystal grains
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Efficiency of diode effect in asymmetric inline long Josephson junctions Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 C. Guarcello, S. Pagano, G. Filatrella
An effective superconducting diode—that is an element whose critical current depends upon the polarity—is achieved with a special configuration of a long Josephson junction and a control line. The proposed geometry is simple, based on the well-established asymmetric inline long Josephson junction, and can be realized using traditional superconductors without the need of magnetic materials. The performance
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On-chip topological phononic crystal acoustic waveguide based on lithium niobate thin films Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Xuankai Xu, Yushuai Liu, Tao Wu
This Letter introduces an on-chip topological phononic crystal (PnC) acoustic waveguide employing lithium niobate thin films. Utilizing a C3v symmetry-breaking mechanism, the topological PnC acoustic waveguide is achieved, operating at frequencies exceeding 430 MHz. A SH0 mode acoustic transceiver is designed, enabling highly efficient on-chip acoustic wave transmission and reception. The fabricated
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Janus tetragonal Mn2BN monolayer: A 2D polar half-metal with coexistent ferroelectricity and magnetism Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Xu Yan, Junyuan Wang, Sheng Wang, Yong Liu, Liangzhi Kou, Guochun Yang
The integration of ferroelectricity, ferromagnetism, and half-metallicity in two-dimensional (2D) materials is pivotal for advancing spintronic device technologies. However, the progress in identifying such materials is limited, and we here propose a compelling approach by constructing asymmetry structures (Janus) based on known 2D magnets, namely, the Janus tetragonal Mn2BN monolayer as a promising
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Chiral structure induces spatial spiral arrangement of Fe3O4 nanoparticles to optimize electromagnetic wave dissipation Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Yongpeng Zhao, Nan Wang, Huaifeng Wang, Shenglin Yuan, Mengmeng Liu, Hui Huang, Yang Zhao, Yuchao Wang, Zhijun Wu, Xin Guo, Lijia Xu
The spatial anisotropic arrangement of magnetic particles is expected to increase the magnetic resonance frequency of magnetic particles and optimize the magnetic loss. Herein, helical carbon nanocoils were used as a chiral template to induce the spatial spiral distribution of Fe3O4 particles. Meanwhile, a linear control group was constructed with carbon nanofibers as a template. The three-dimensional
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Advances in the development of few-cycle gigawatt-peak-power mid-IR optical parametric amplifiers pumped by Cr:Forsterite laser using non-oxide nonlinear crystals Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 D. Z. Suleimanova, E. A. Migal, D. V. Badikov, F. V. Potemkin
We demonstrate an experimental and theoretical comparison of non-oxide LiGaS2, HgGa2S4, and AgGaS2 crystals performance for wavelength conversion into the near and mid-IR range 1.5–8 μm in optical parametric amplifier pumped by Cr:Forsterite laser, delivering 100 fs pulses at 1.24 μm. It is shown that exceptionally high total energy conversion efficiency into the idler (4–5 μm) and signal (1.65–1.8
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Photogalvanic spectroscopy on MnBi2Te4 topological insulator thin films Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Tsubasa Takagi, Ryota Watanabe, Ryutaro Yoshimi, Atsushi Tsukazaki, Kei S. Takahashi, Masashi Kawasaki, Yoshinori Tokura, Naoki Ogawa
We demonstrate zero-bias mid-infrared photocurrent generation in topological insulator MnBi2Te4 thin films. The symmetry breakings at the surface and interfaces lead to the coexistence of Dirac and Rashba band states, which enable two kinds of photogalvanic responses. One is the magneto-photogalvanic effect in the presence of an external in-plane magnetic field perpendicular to photocurrent direction
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Transparent and flexible thermoelectric thin films based on copper sulfides Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Siyuan Ruan, Liangjun Wang, Yuzhao Ouyang, Jialin Yang, Xiaowan Kang, Xiaojian Chen, Chang Yang
As a promising thermoelectric material, CuS has attracted significant attention due to its high conductivity, abundance of elements, and eco-friendliness. However, the study on CuS-based thermoelectric thin films is still lacking, impeding the advancement of CuS-based thermoelectric devices. Herein, high-quality CuS thin films have been fabricated through a facile vulcanization process. The effects
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TD-graphene: Theoretical prediction of a high-performance anode material for sodium-ion batteries with intrinsic metallicity, high capacity, and fast ion mobility Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Ru-Feng Zou, Zhi-Hui Wu, Tian-Ci Ma, Xiao-Hong Zheng, Xiao-Juan Ye, He Lin, Chun-Sheng Liu
The utilization of pristine graphene as an anode material in sodium-ion batteries (SIBs) is limited by its inherent chemical inertness toward Na-ions. To address this issue, we propose a two-dimensional carbon allotrope (named as TD-graphene) by assembling tricyclo[4.4.1.11,6]dodecane (C12H20) skeleton. The topological non-hexagonal feature of C12H20 increases the degree of local carbon-ring disorder
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Swift heavy ion irradiation-driven energy band engineering and its profound influence on the photoresponse of β-Ga2O3 ultraviolet photodetectors Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-12 Huiping Zhu, Yuanjun Tang, Aoxue Zhong, Lei Wang, Fanyu Liu, Peixiong Zhao, Jie Liu, Lei Shu, Zhenping Wu, Bo Li
Swift heavy Ta ions with an ultra-high energy of 2896 MeV are utilized for irradiation of β-Ga2O3 photodetectors. Noteworthy variations in device performance under different wavelengths are observed. Under 254 nm light illumination, the photocurrent of the devices exhibit degradation at low ion fluences but gradually recover and even surpass the performance of non-irradiated devices at the irradiation
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Prediction of phonon properties of cubic boron nitride with vacancy defects and isotopic disorders by using a neural network potential Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-11 Jingwen Zhang, Junjie Zhang, Guoqiang Bao, Zehan Li, Xiaobo Li, Te-Huan Liu, Ronggui Yang
Cubic boron nitride (c-BN) is a promising ultra-wide bandgap semiconductor for high-power electronic devices. Its thermal conductivity can be substantially modified by controlling the isotope abundance and by the quality of a single crystal. Consequently, an understanding of the phonon transport in c-BN crystals, with both vacancy defects and isotopic disorders at near-ambient temperatures, is of practical
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Metallic barrier layer for Ag2S1−xSex inorganic ductile thermoelectric materials Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-11 Liming Peng, Tong Xing, Pengfei Qiu, Jincheng Liao, Ming Gu, Chenxi Zhu, Xun Shi
Metallic barrier layer is a key component in thermoelectric (TE) devices, but it is rarely investigated for the recently discovered inorganic ductile TE materials. In this work, we demonstrate that tungsten (W) is the excellent metallic barrier layer for Ag2S1−xSex ductile thermoelectric materials. The phase composition, microstructure, adhesive strength, and interfacial contact resistivity (ρC) of
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Absolute density measurement of hydrogen radicals in XUV induced plasma for tin contamination cleaning via laser-induced fluorescence Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-10 Nozomi Tanaka, Baojun Zhu, Chang Liu, Yubo Wang, Katsunobu Nishihara, James Edward Hernandez, Tomoyuki Johzaki, Atsushi Sunahara, Kyung Sik Kang, Shinji Ueyama, Ken Ozawa, Shinsuke Fujioka
Effective cleaning of tin contamination on the collecting mirrors in extreme ultraviolet source is one of the key techniques to improve throughput and cost performance of extreme ultraviolet lithography. Hydrogen radicals produced in hydrogen plasma that is induced by wideband extreme ultraviolet radiation are expected to be utilized for in situ tin contamination cleaning in extreme ultraviolet sources
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Nonlinear Hall effect and scaling law in Sb-doped topological insulator MnBi4Te7 Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-10 Shaoyu Wang, Xiubing Li, Heng Zhang, Bo Chen, Hangkai Xie, Congcong Li, Fucong Fei, Shuai Zhang, Fengqi Song
The nonlinear Hall effect (NLHE), as a new member of Hall effect family, has been realized in many materials, attracting a great deal of attention. Here, we report the observation of NLHE in magnetic topological insulator Sb-doped MnBi4Te7 flakes. The NLHE generation efficiency can reach up to 0.06 V−1, which is comparable to that observed in MnBi2Te4. Differently, the NLHE can survive up to 200 K
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Multi-entropy electrocaloric film induced by three-dimensional thermal conductive ceramic network for synergistic thermal management Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-10 Fang Wang, Wei-Long Wu, Ming Wu, Dong-Shan Zhou, Xiao-Liang Wang, Qun-Dong Shen
Imparting high thermal conductivity to electrocaloric refrigeration polymers is a promising solution for efficiently synergizing and accurately managing the vast heat generated by high-power density electronics. We employed a sacrificial template method to construct a three-dimensional thermally conductive SiOC ceramic network and embedded it in the electrocaloric polymer. The electrocaloric composite