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Intense Mid-Infrared Laser Pulse Generated via Flying-Mirror Red-Shifting in Near-Critical-Density Plasmas Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-02-01 Yu Lu, Dong-Ao Li, Qian-Ni Li, Fu-Qiu Shao, Tong-Pu Yu
Relativistic femtosecond mid-infrared pulses can be generated efficiently by laser interaction with near-critical-density plasmas. It is found theoretically and numerically that the radiation pressure of a circularly polarized laser pulse first compresses the plasma electrons to form a dense flying mirror with a relativistic high speed. The pulse reflected by the mirror is red-shifted to the mid-infrared
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Synthesis Methods and Property Control of Two-Dimensional Magnetic Materials Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-02-01 Ming-Shuang Li, Hui-Min Li, Song Liu
Two-dimensional (2D) magnetic materials have been demonstrated to have excellent chemical, optical, electrical, and magnetic properties, particularly in the development of multifunctional electronic and spin electronic devices, showcasing tremendous potential. Therefore, corresponding synthesis techniques for 2D magnetic materials that offer high quality, high yield, low cost, time-saving, and simplicity
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Ultrathin Limit on the Anisotropic Superconductivity of Single-Layered Cuprate Films Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-02-01 Feng Ran, Pan Chen, Dingyi Li, Peiyu Xiong, Zixin Fan, Haoming Ling, Yan Liang, Jiandi Zhang
Exploring dimensionality effects on cuprates is important for understanding the nature of high-temperature superconductivity. By atomically layer-by-layer growth with oxide molecular beam epitaxy, we demonstrate that La2–x Sr x CuO4 (x = 0.15) thin films remain superconducting down to 2 unit cells of thickness but quickly reach the maximum superconducting transition temperature at and above 4 unit
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Localization Dynamics at the Exceptional Point of Non-Hermitian Creutz Ladder Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-02-01 S. M. Zhang, T. Y. He, L. Jin
We propose a quasi-one-dimensional non-Hermitian Creutz ladder with an entirely flat spectrum by introducing alternating gain and loss components while maintaining inversion symmetry. Destructive interference generates a flat spectrum at the exceptional point, where the Creutz ladder maintains coalesced and degenerate eigenvalues with compact localized states distributed in a single plaquette. All
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Vortex Quantum Droplets under Competing Nonlinearities Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-02-01 Gui-hua Chen, Hong-cheng Wang, Hai-ming Deng, Boris A. Malomed
This concise review summarizes recent advancements in theoretical studies of vortex quantum droplets (VQDs) in matter-wave fields. These are robust self-trapped vortical states in two- and three-dimensional (2D and 3D) Bose–Einstein condensates (BECs) with intrinsic nonlinearity. Stability of VQDs is provided by additional nonlinearities resulting from quantum fluctuations around mean-field states
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e+e−→Λc+Λ¯c− Cross Sections and the Λc+ Electromagnetic Form Factors within the Extended Vector Meson Dominance Model Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-02-01 Cheng Chen, Bing Yan, Ju-Jun Xie
Within the extended vector meson dominance model, we investigate the e+e−→Λc+Λ¯c− reaction and the electromagnetic form factors of the charmed baryon Λc+ . The model parameters are determined by fitting them to the cross sections of the process e+e−→Λc+Λ¯c− and the magnetic form factor |G M| of Λc+ . By considering four charmonium-like states, called ψ(4500), ψ(4660), ψ(4790), and ψ(4900), we can well
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Exploring Sulfur Chemistry in TMC-1 with NSRT Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-02-01 Wasim Iqbal, Xiaohu Li, Juan Tuo, Ryszard Szczerba, Yanan Feng, Zhenzhen Miao, Jiangchao Yang, Jixing Ge, Gleb Fedoseev, Donghui Quan, Qiang Chang, Chuan-Lu Yang, Tao Yang, Gao-Lei Hou, Yong Zhang, Xuan Fang, Xia Zhang, Fangfang Li, Rong Ma, Xiaomin Song, Zhiping Kou, Yuxuan Sun
There have been several studies on sulfur depletion in dense cores like TMC-1 (Taurus Molecular Cloud 1), employing updated reaction networks for sulfur species to explain the missing sulfur in the gas within dense clouds. Most of these studies used a C/O ratio of 0.7 or lower. We present NSRT (NanShan 26m Radio Telescope) observations of TMC-1 alongside results from time-dependent chemical simulations
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Profiling Electronic and Phononic Band Structures of Semiconductors at Finite Temperatures: Methods and Applications Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-02-01 Xie Zhang, Jun Kang, Su-Huai Wei
Semiconductor devices are often operated at elevated temperatures that are well above zero Kelvin, which is the temperature in most first-principles density functional calculations. Computational approaches to computing and understanding the properties of semiconductors at finite temperatures are thus in critical demand. In this review, we discuss the recent progress in computationally assessing the
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A Search for Radio Pulsars in Supernova Remnants Using FAST with One Pulsar Discovered Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-02-01 Zhen Zhang, Wen-Ming Yan, Jian-Ping Yuan, Na Wang, Jun-Tao Bai, Zhi-Gang Wen, Bao-Da Li, Jin-Tao Xie, De Zhao, Yu-Bin Wang, Nan-Nan Zhai
We report the results of a search for radio pulsars in five supernova remnants (SNRs) with the FAST telescope. The observations were made using the 19-beam receiver in “snapshot” mode. The integration time for each pointing was 10 min. We discovered a new pulsar, PSR J1845–0306, which has a spin period of 983.6 ms and a dispersion measure of 444.6 ± 2.0 cm−3⋅pc, in observations of SNR G29.6+0.1. To
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Three-Wave Mixing of Dipole Solitons in One-Dimensional Quasi-Phase-Matched Nonlinear Crystals Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-01-01 Yuxin Guo, Xiaoxi Xu, Zhaopin Chen, Yangui Zhou, Bin Liu, Hexiang He, Yongyao Li, Jianing Xie
A quasi-phase-matched technique is introduced for soliton transmission in a quadratic [χ (2)] nonlinear crystal to realize the stable transmission of dipole solitons in a one-dimensional space under three-wave mixing. We report four types of solitons as dipole solitons with distances between their bimodal peaks that can be laid out in different stripes. We study three cases of these solitons: spaced
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A Composite Ansatz for Calculation of Dynamical Structure Factor Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-01-01 Yupei Zhang, Chongjie Mo, Ping Zhang, Wei Kang
We propose an ansatz without adjustable parameters for the calculation of a dynamical structure factor. The ansatz combines the quasi-particle Green’s function, especially the contribution from the renormalization factor, and the exchange-correlation kernel from time-dependent density functional theory together, verified for typical metals and semiconductors from a plasmon excitation regime to the
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Predicted Critical State Based on Invariance of the Lyapunov Exponent in Dual Spaces Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-01-01 Tong Liu, Xu Xia
Critical states in disordered systems, fascinating and subtle eigenstates, have attracted a lot of research interests. However, the nature of critical states is difficult to describe quantitatively, and in general, it cannot predict a system that hosts the critical state. We propose an explicit criterion whereby the Lyapunov exponent of the critical state should be 0 simultaneously in dual spaces,
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Experimentally Ruling Out Joint Reality Based on Locality with Device-Independent Steering Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-01-01 Shuaining Zhang, Xiang Zhang, Zhiyue Zheng, Wei Zhang
As an essential concept to understand the world, whether the real values (or physical realities) of observables are suitable to physical systems beyond the classic has been debated for many decades. Although standard no-go results based on Bell inequalities have ruled out the joint reality of incompatible quantum observables, the possibility of giving simple yet strong arguments to rule out joint reality
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Modulation of High-Order Harmonic Generation from a Monolayer ZnO by Co-rotating Two-Color Circularly Polarized Laser Fields Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-01-01 Yue Qiao, Jiaqi Chen, Shushan Zhou, Jigen Chen, Shicheng Jiang, Yujun Yang
By numerically solving the two-dimensional semiconductor Bloch equation, we study the high-order harmonic emission of a monolayer ZnO under the driving of co-rotating two-color circularly polarized laser pulses. By changing the relative phase between the fundamental frequency field and the second one, it is found that the harmonic intensity in the platform region can be significantly modulated. In
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Real-Time Observation of Instantaneous ac Stark Shift of a Vacuum Using a Zeptosecond Laser Pulse Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-01-01 Dandan Su, Miao Jiang
Based on the numerical solution of the time-dependent Dirac equation, we propose a method to observe in real time the ac Stark shift of a vacuum driven by an ultra-intense laser field. By overlapping the ultra-intense pump pulse with another zeptosecond probe pulse whose photon energy is smaller than 2mc 2, electron–positron pair creation can be controlled by tuning the time delay between the pump
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Optical Nonlinearity of Violet Phosphorus and Applications in Fiber Lasers Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-01-01 Hui-ran Yang, Meng-ting Qi, Xu-peng Li, Ze Xue, Chen-hao Lu, Jia-wei Cheng, Dong-dong Han, Lu Li
A D-shaped fiber is coated with a new two-dimensional nanomaterial, violet phosphorus (VP), to create a saturable absorber (SA) with a modulation depth of 3.68%. Subsequently, the SA is inserted into a fiber laser, enabling successful generation of dark solitons and bright–dark soliton pairs through adjustment of the polarization state within the cavity. Through further study, mode-locked pulses are
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High-Temperature Superconductivity in La3Ni2O7 Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-01-01 Kun Jiang, Ziqiang Wang, Fu-Chun Zhang
Motivated by the recent discovery of high-temperature superconductivity in bilayer La3Ni2O7 under pressure, we study its electronic properties and superconductivity due to strong electron correlation. Using the inversion symmetry, we decouple the low-energy electronic structure into block-diagonal symmetric and antisymmetric sectors. It is found that the antisymmetric sector can be reduced to a one-band
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Acoustic Bilayer Gradient Metasurfaces for Perfect and Asymmetric Beam Splitting Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-01-01 Jiaqi Quan, Baoyin Sun, Yangyang Fu, Lei Gao, Yadong Xu
We experimentally and theoretically present a paradigm for the accurate bilayer design of gradient metasurfaces for wave beam manipulation, producing an extremely asymmetric splitting effect by simply tailoring the interlayer size. This concept arises from anomalous diffraction in phase gradient metasurfaces and the precise combination of the phase gradient in bilayer metasurfaces. Ensured by different
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Phonon Thermal Transport at Interfaces of a Graphene/Vertically Aligned Carbon Nanotubes/Hexagonal Boron Nitride Sandwiched Heterostructure Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-01-01 Menglin Li, Muhammad Asif Shakoori, Ruipeng Wang, Haipeng Li
Molecular dynamics simulation is used to calculate the interfacial thermal resistance of a graphene/carbon nanotubes/hexagonal boron nitride (Gr/CNTs/hBN) sandwiched heterostructure, in which vertically aligned carbon nanotube (VACNT) arrays are covalently bonded to graphene and hexagonal boron nitride layers. We find that the interfacial thermal resistance (ITR) of the Gr/VACNT/hBN sandwiched heterostructure
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Twin-Capture Rydberg State Excitation Enhanced with Few-Cycle Laser Pulses Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-01-01 Jing Zhao, Jinlei Liu, Xiaowei Wang, Zengxiu Zhao
Quantum excitation is usually regarded as a transient process occurring instantaneously, leaving the underlying physics shrouded in mystery. Recent research shows that Rydberg-state excitation with ultrashort laser pulses can be investigated and manipulated with state-of-the-art few-cycle pulses. We theoretically find that the efficiency of Rydberg state excitation can be enhanced with a short laser
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Signature of Superconductivity in Pressurized La4Ni3O10 Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-01-01 Qing Li, Ying-Jie Zhang, Zhe-Ning Xiang, Yuhang Zhang, Xiyu Zhu, Hai-Hu Wen
The discovery of high-temperature superconductivity near 80 K in bilayer nickelate La3Ni2O7 under high pressures has renewed the exploration of superconducting nickelate in bulk materials. The extension of superconductivity in other nickelates in a broader family is also essential. Here, we report the experimental observation of superconducting signature in trilayer nickelate La4Ni3O10 under high pressures
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Magnetic Topological Dirac Semimetal Transition Driven by SOC in EuMg2Bi2 Chin. Phys. Lett. (IF 3.5) Pub Date : 2024-01-01 J. M. Wang, H. J. Qian, Q. Jiang, S. Qiao, M. Ye
Magnetic topological semimetals have been at the forefront of condensed matter physics due to their ability to exhibit exotic transport phenomena. Investigating the interplay between magnetic and topological orders in systems with broken time-reversal symmetry is crucial for realizing non-trivial quantum effects. We delve into the electronic structure of the rare-earth-based antiferromagnetic Dirac
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All-Optical Switches for Optical Soliton Interactions in a Birefringent Fiber Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Xin Zhang, Houhui Yi, Yanli Yao, Shubin Wang, Lingxian Shi
Interactions among optical solitons can be used to develop photonic information processing devices such as all-optical switches and all-optical logic gates. It is the key to achieve high-speed, high-capacity all-optical networks and optical computers, which is also important in academy. We study the properties of all-optical switches of optical solitons in birefringent fibers, based on the coupled
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Ground State and Its Topological Properties of Three-Dimensional Spin-Orbit Coupled Degenerate Fermi Gases Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Long Xiong, Ming Gong, Zhao-Xiang Fang, Rui Sun
Three-dimensional (3D) degenerate Fermi gases in the presence of spin-orbit coupling, inducing various kinds of physical findings and phenomena, have attracted tremendous attention in these years. We investigate the 3D spin-orbit coupled degenerate Fermi gases in theory and first present the analytic expression of their ground state. Our study provides an innovative perspective into understanding of
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Multi-Pseudo Peakons in the b-Family Fifth-Order Camassa–Holm Model Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Dinghao Zhu, Xiaodong Zhu
The b-family fifth-order Camassa–Holm model is a nontrivial extension of the celebrated Camassa–Holm model. This work investigates single-pseudo and multi-pseudo peakon solutions of this model via analytical calculations and numerical simulations. Some intriguing phenomena of multi-pseudo peakon which do not appear in the classical Camassa–Holm model interactions are observed, such as two-pseudo peakon
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Ultrafast Fiber Laser Based on Tungsten Sulphoselenide Materials Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Xiao-Chuan Meng, Lu Li, Nai-Zhang Sun, Ze Xue, Qi Liu, Han Ye, Wen-Jun Liu
Tungsten sulphoselenide (WSSe) alloys, belonging to the transition metal dichalcogenide family, have attracted significant interest in the area of optoelectronics because of their unique optical and electronic properties. However, there has been a dearth of sufficient research on the saturable absorption features and ultrafast lasers applications. Herein, we fabricated a WSSe-microfiber saturable absorber
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Highly Anisotropic Magnetism and Nearly Isotropic Magnetocaloric Effect in Mn3Sn2 Single Crystals Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Jianli Bai, Qingxin Dong, Libo Zhang, Qiaoyu Liu, Jingwen Cheng, Pinyu Liu, Cundong Li, Yingrui Sun, Yu Huang, Zhian Ren, Genfu Chen
Mn3Sn2 has been proposed as an ideal material for magnetic refrigeration. It undergoes two successive ferromagnetic transitions (T C1 = 262 K and T C2 = 227 K) and one antiferromagnetic transition (T N = 192 K). Herein we report, for the first time, the preparation of single crystals of Mn3Sn2 from Bi flux. The resultant anisotropic magnetic properties and magnetocaloric effect are investigated along
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Bounding Free Energy Difference with Flow Matching Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Lu Zhao, Lei Wang
We introduce a method for computing the Helmholtz free energy using the flow matching technique. Unlike previous work that utilized flow-based models for variational free energy calculations, this method provides bounds for free energy estimation based on targeted free energy perturbation by performing calculations on samples from both ends of the mapping. We demonstrate applications of the present
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Determination of Work Function for p- and n-Type 4H-SiC Single Crystals via Scanning Kelvin Probe Force Microscopy Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Hui Li, Guobin Wang, Jingyu Yang, Zesheng Zhang, Jun Deng, Shixuan Du
Silicon carbide (SiC) is a promising platform for fabricating high-voltage, high-frequency and high-temperature electronic devices such as metal oxide semiconductor field effect transistors in which many junctions or interfaces are involved. The work function (WF) plays an essential role in these devices. However, studies of the effect of conductive type and polar surfaces on the WF of SiC are limited
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Simulation Prediction of Heat Transport with Machine Learning in Tokamak Plasmas Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Hui Li, Yan-Lin Fu, Ji-Quan Li, Zheng-Xiong Wang
Machine learning opens up new possibilities for research of plasma confinement. Specifically, models constructed using machine learning algorithms may effectively simplify the simulation process. Previous first-principles simulations could provide physics-based transport information, but not fast enough for real-time applications or plasma control. To address this issue, this study proposes SExFC,
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Chiral Dirac Fermion in a Collinear Antiferromagnet Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Ao Zhang, Ke Deng, Jieming Sheng, Pengfei Liu, Shiv Kumar, Kenya Shimada, Zhicheng Jiang, Zhengtai Liu, Dawei Shen, Jiayu Li, Jun Ren, Le Wang, Liang Zhou, Yoshihisa Ishikawa, Takashi Ohhara, Qiang Zhang, Garry McIntyre, Dehong Yu, Enke Liu, Liusuo Wu, Chaoyu Chen, Qihang Liu
In a Dirac semimetal, the massless Dirac fermion has zero chirality, leading to surface states connected adiabatically to a topologically trivial surface state as well as vanishing anomalous Hall effect. Recently, it is predicted that in the nonrelativistic limit of certain collinear antiferromagnets, there exists a type of chiral “Dirac-like” fermion, whose dispersion manifests four-fold degenerate
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Realizations, Characterizations, and Manipulations of Two-Dimensional Electron Systems Floating above Superfluid Helium Surfaces Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Haoran Wei, Mengmeng Wu, Renfei Wang, Mingcheng He, Hiroki Ikegami, Yang Liu, Zhi Gang Cheng
Electron systems in low dimensions are enriched with many superior properties for both fundamental research and technical developments. Wide tunability of electron density, high mobility of motion, and feasible controllability in microscales are the most prominent advantages that researchers strive for. Nevertheless, it is always difficult to fulfill all in one solid-state system. Two-dimensional electron
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A Possible Quantum Spin Liquid Phase in the Kitaev–Hubbard Model Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Shaojun Dong, Hao Zhang, Chao Wang, Meng Zhang, Yong-Jian Han, Lixin He
The quantum spin liquid (QSL) state of Kitaev-like materials, such as iridium oxides A 2IrO3 and α-RuCl3, has been explored in depth. The half-filled Kitaev–Hubbard model with bond-dependent hopping terms is used to describe the Kitaev-like materials, which is calculated using the state-of-the-art fermionic projected entangled pair states method. We find a QSL phase near the Mott insulator transition
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Performance Improvement of a Direct Carbon Fuel Cell through an Irreversible Vacuum Thermionic Generator Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Yuan Wang, Shanhe Su
A novel hybrid system consisting of a direct carbon fuel cell (DCFC), a thermionic generator (TIG), and a regenerator is developed to recover the exhaust heat from the fuel cell. Expressions for the power output and efficiency of subsystems and the hybrid system are derived. Based on the energy balance equation, the area matching problem between the DCFC and the TIG is discussed and solved. By considering
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New Painlevé Integrable (3+1)-Dimensional Combined pKP-BKP Equation: Lump and Multiple Soliton Solutions Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Abdul-Majid Wazwaz
We introduce a new form of the Painlevé integrable (3+1)-dimensional combined potential Kadomtsev--Petviashvili equation incorporating the B-type Kadomtsev–Petviashvili equation (pKP–BKP equation). We perform the Painlevé analysis to emphasize the complete integrability of this new (3+1)-dimensional combined integrable equation. We formally derive multiple soliton solutions via employing the simplified
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VASP2KP: k⋅p Models and Landé g-Factors from ab initio Calculations Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Sheng Zhang, Haohao Sheng, Zhi-Da Song, Chenhao Liang, Yi Jiang, Song Sun, Quansheng Wu, Hongming Weng, Zhong Fang, Xi Dai, Zhijun Wang
The k⋅p method is significant in condensed matter physics for the compact and analytical Hamiltonian. In the presence of magnetic field, it is described by the effective Zeeman’s coupling Hamiltonian with Landé g-factors. Here, we develop an open-source package VASP2KP (including two parts: vasp2mat and mat2kp) to compute k⋅p parameters and Landé g-factors directly from the wavefunctions provided by
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Phase Transition Study Meets Machine Learning Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Yu-Gang Ma, Long-Gang Pang, Rui Wang, Kai Zhou
In recent years, machine learning (ML) techniques have emerged as powerful tools for studying many-body complex systems, and encompassing phase transitions in various domains of physics. This mini review provides a concise yet comprehensive examination of the advancements achieved in applying ML to investigate phase transitions, with a primary focus on those involved in nuclear matter studies.
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Characteristics of Speed–Acceleration Phase Diagram of Migrating Cells Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Yikai Ma, Wei Chen
Cell movement behavior is one of the most interesting biological problems in physics, biology, and medicine. We experimentally investigate the characteristics of random cell motion during migration. Observing cell motion trajectories under a microscope, we employ a nonlinear dynamics method to construct a speed–acceleration phase diagram. Our analysis reveals the presence of a fixed point in this phase
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Unconventional Nonreciprocal Voltage Transition in Ag2Te Nanobelts Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Peng-Liang Leng, Xiang-Yu Cao, Qiang Ma, Lin-Feng Ai, Yu-Da Zhang, Jing-Lei Zhang, Fa-Xian Xiu
Nonreciprocal effects are consistently observed in noncentrosymmetric materials due to the intrinsic symmetry breaking and in high-conductivity systems due to the extrinsic thermoelectric effect. Meanwhile, nonreciprocal charge transport is widely utilized as an effective experimental technique for detecting intrinsic unidirectional electrical contributions. Here, we show an unconventional nonreciprocal
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Introduction of Asymmetry to Enhance Thermal Transport in Porous Metamaterials at Low Temperature Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Yu Yang, Dengke Ma, Lifa Zhang
Introducing porosity with different degrees of disorder has been widely used to regulate thermal properties of materials, which generally results in decrease of thermal conductivity. We investigate the thermal conductivity of porous metamaterials in the ballistic transport region by using the Lorentz gas model. It is found that the introduction of asymmetry and Gaussian disorder into porous metamaterials
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Modifying the Electron Dynamics in High-Order Harmonic Generation via a Two-Color Laser Field Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Cai-Ping Zhang, Xiang-Yang Miao
We investigate the harmonic emission from bichromatic periodic potential by numerically solving the time-dependent Schrödinger equation in the velocity gauge. The results show that the harmonic minimum is sensitive to the wavelength. Moreover, distinct crystal momentum states contribute differently to harmonic generation. In momentum space, the electron dynamics reveal a close relationship between
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Status and Prospects of Exotic Hadrons at Belle II Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Sen Jia, Weitao Xiong, Chengping Shen
In the past 20 years, many new hadrons that are difficult to explain within the conventional quark model have been discovered in the quarkonium region; these are called exotic hadrons. The Belle II experiment, as the next-generation B factory, provides a good platform for exploring them. The charmonium-like states can be produced at Belle II in several ways, such as B meson decays, initial-state radiation
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Negative Poisson’s Ratios of Layered Materials by First-Principles High-Throughput Calculations Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-12-01 Hanzhang Zhao, Yuxin Cai, Xinghao Liang, Kun Zhou, Hongshuai Zou, Lijun Zhang
Auxetic two-dimensional (2D) materials, known from their negative Poisson’s ratios (NPRs), exhibit the unique property of expanding (contracting) longitudinally while being laterally stretched (compressed), contrary to typical materials. These materials offer improved mechanical characteristics and hold great potential for applications in nanoscale devices such as sensors, electronic skins, and tissue
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Entropy of Regular Black Holes in Einstein’s Gravity Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-11-01 Chen Lan, Yan-Gang Miao
We calculate the entropy of spherically symmetric regular black holes by the path-integral method in Einstein’s gravity. This method provides evidence that the entropy of spherically symmetric regular black holes is proportional to a quarter of horizon area, indicating no violation of the entropy-area law.
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Tunable Memory and Activity of Quincke Particles in Micellar Fluid Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-11-01 Yang Yang, Meng Fei Zhang, Lailai Zhu, Tian Hui Zhang
Memory can remarkably modify the collective behavior of active particles. We show that, in a micellar fluid, Quincke particles driven by a square-wave electric field exhibit a frequency-dependent memory. Upon increasing the frequency, a memory of directions emerges, whereas the activity of particles decreases. As the activity is dominated by interaction, Quincke particles aggregate and form dense clusters
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Unidirectional Negative Refraction at an Exceptional Point of Acoustic PT-Symmetric Systems Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-11-01 Chen Liu, Jun Lan, Zhongming Gu, Jie Zhu
We demonstrate a method to realize unidirectional negative refraction in an acoustic parity-time (PT)-symmetric system, which is composed of a pair of metasurfaces sandwiching an air gap. The pair of metasurfaces possesses loss and gain modulations. The unidirectional negative refraction, which is strictly limited to the case of incident wave imposing on the loss end of the metasurface, is demonstrated
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Local Rotational Jamming and Multi-Stage Hyperuniformities in an Active Spinner System Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-11-01 Rui Liu, Jianxiao Gong, Mingcheng Yang, Ke Chen
An active system consisting of many self-spinning dimers is simulated, and a distinct local rotational jamming transition is observed as the density increases. In the low density regime, the system stays in an absorbing state, in which each dimer rotates independently subject to the applied torque; while in the high density regime, a fraction of the dimers become rotationally jammed into local clusters
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Effective Bi-Layer Model Hamiltonian and Density-Matrix Renormalization Group Study for the High-T c Superconductivity in La3Ni2O7 under High Pressure Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-11-01 Yang Shen, Mingpu Qin, Guang-Ming Zhang
High-T c superconductivity with possible T c ≈ 80 K has been reported in the single crystal of La3Ni2O7 under high pressure. Based on the electronic structure given by the density functional theory calculations, we propose an effective bi-layer model Hamiltonian including both 3d z 2 and 3d x 2–y 2 orbital electrons of the nickel cations. The main feature of the model is that the 3d z 2 electrons form
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Splitting of Degenerate Superatomic Molecular Orbitals Determined by Point Group Symmetry Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-11-01 Rui Wang, Jiarui Li, Zhonghua Liu, Chenxi Wan, Zhigang Wang
We first confirm an idea obtained from first-principles calculations, which is in line with symmetry theory: Although superatomic molecular orbitals (SAMOs) can be classified according to their angular momentum similar to atomic orbitals, SAMOs with the same angular momentum split due to the point group symmetry of superatoms. Based on this idea, we develop a method to quantitatively modulate the splitting
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Resonant Charge Transport Assisted by the Molecular Vibration in Single-Molecule Junction from Time-Domain ab initio Nonadiabatic Molecular Dynamics Simulations Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-11-01 Yunzhe Tian, Qijing Zheng, Jin Zhao
Using ab initio nonadiabatic molecular dynamics simulation, we study the time-dependent charge transport dynamics in a single-molecule junction formed by gold (Au) electrodes and a single benzene-1,4-dithiol (BDT) molecule. Two different types of charge transport channels are found in the simulation. One is the routine non-resonant charge transfer path, which occurs in several picoseconds. The other
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Spin Hall Magnetoresistance in Pt/BiFeO3 Bilayer Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-11-01 Anpeng He, Yu Lu, Jun Du, Yufei Li, Zhong Shi, Di Wu, Qingyu Xu
Multiferroic materials are general antiferromagnets with negligibly small net magnetization, which strongly limits their magnetoelectric applications in spintronics. Spin Hall magnetoresistance (SMR) is sensitive to the orientation of the Néel vector, which can be applied for the detection of antiferromagnetic states. Here, we apply SMR on the unique room-temperature antiferromagnetic multiferroic
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Prediction of Thermal Conductance of Complex Networks with Deep Learning Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-11-01 Changliang Zhu, Xiangying Shen, Guimei Zhu, Baowen Li
Predicting thermal conductance of complex networks poses a formidable challenge in the field of materials science and engineering. This challenge arises due to the intricate interplay between the parameters of network structure and thermal conductance, encompassing connectivity, network topology, network geometry, node inhomogeneity, and others. Our understanding of how these parameters specifically
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Observation of Enhanced Faraday Effect in Eu-Doped Ce:YIG Thin Films Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-11-01 Han-Xu Zhang, Sen-Yin Zhu, Jin Zhan, Xian-Jie Wang, Yi Wang, Tai Yao, N. I. Mezin, Bo Song
Ce:YIG thin films are taken as an ideal candidate for magneto-optical devices with giant Faraday effect in the near-infrared range, but it is hindered by a limited Ce3+/Ce4+ ratio and a high saturation driving field. To address this issue, Eu doping can increase the Faraday rotation angle by ∼ 40% to 1.315 × 104 deg/cm and decrease the saturation driving field by ∼ 38% to 1.17 kOe in Eu0.75Ce1Y1.25Fe5O12
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Intensity-Dependent Dipole Phase in High-Order Harmonic Interferometry Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-11-01 Li Wang, Fan Xiao, Pan Song, Wenkai Tao, Xu Sun, Jiacan Wang, Zhigang Zheng, Jing Zhao, Xiaowei Wang, Zengxiu Zhao
High-order harmonics are ideal probes to resolve the attosecond dynamics of strong-field recollision processes. An easy-to-implement phase mask is utilized to covert the Gaussian beam to TEM01 transverse electromagnetic mode, allowing the realization of two-source interferometry of high-order harmonics. We experimentally measure the intensity dependence of dipole phase directly with high-order harmonic
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Physical Origin of Color Changes in Lutetium Hydride under Pressure Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-11-01 Run Lv, Wenqian Tu, Dingfu Shao, Yuping Sun, Wenjian Lu
Recently, near-ambient superconductivity was claimed in nitrogen-doped lutetium hydride (LuH3–δ N ε ). Unfortunately, all follow-up research still cannot find superconductivity signs in successfully synthesized lutetium dihydride (LuH2) and N-doped LuH2±x N y . However, a similar intriguing observation was the pressure-induced color changes (from blue to pink and subsequent red). The physical understanding
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Chirp Compensation for Generating Ultrashort Attosecond Pulses with 800-nm Few-Cycle Pulses Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-11-01 Li Wang, Xiaowei Wang, Fan Xiao, Jiacan Wang, Wenkai Tao, Dongwen Zhang, Zengxiu Zhao
We show that it is feasible to generate sub-40-attosecond pulses with near-infrared few-cycle pulses centered at 800 nm. With proper gating technique, super-broadband continuum spectrum extending from 50 eV to above 200 eV can be obtained, and the intrinsic atto-chirp can be satisfactorily compensated with C filter, producing isolated attosecond pulses with duration of 33 as. According to the wavelength
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Preparation of Bi2Te3 Based on Saturable Absorption System and Its Application in Fiber Lasers Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-11-01 Haoyu Wang, Yue-Jia Xiao, Qi Liu, Xiao-Wei Xing, Hu-Jiang Yang, Wen-Jun Liu
Fiber laser is a fundamental component of laser systems and is of great significance for development of laser technology. Its pulse output can be divided into Q-switched and mode-locked. Achieving ultrashort pulse with narrower pulse duration and higher power is the focus of current research on mode-locked lasers. As an important component of fiber laser systems, saturable absorber (SA) can modulate
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Magneto-Orientated Graphite Double-Layer Homo-Structure with Broadband Microwave Absorption Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-11-01 Jun-Song Wang, Wei Ding, Cheng-Hong Zhang, Kang Qiu, You-Lin Gao, Mian-Ke Chen, Muhammad Adnan Aslam, Mahmoud A. Khalifa, Jia-Liang Luo, Jun Fang, Zhi-Gao Sheng
We utilized magnetic fields as an efficient tool to manipulate the orientation and electromagnetic properties of graphite micro-flakes (GMFs). As a result, we successfully developed a GMF double-layer homo-structure, which shows excellent electromagnetic absorption properties. By tuning the direction of a small magnetic field (850 G), vertical and horizontal aligned GMFs are produced. Their electromagnetic
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Global Positioning Scheme via Quantum Teleportation Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-11-01 You-Quan Li, Li-Hua Lu, Qi-Hang Zhu
Quantum teleportation scheme is undoubtedly an inspiring theoretical discovery as an amazing application of quantum physics, which was experimentally realized several years later. For the purpose of quantum communication via this scheme, an entangled ancillary pair shared by Alice and Bob is the essential ingredient, and a quantum memory in Bob’s system is necessary for him to keep the quantum state
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Wave-Particle Duality via Quantum Fisher Information Chin. Phys. Lett. (IF 3.5) Pub Date : 2023-11-01 Chang Niu, Sixia Yu
Quantum Fisher information (QFI) plays an important role in quantum metrology, placing the ultimate limit to how precise we can estimate some unknown parameter and thus quantifying how much information we can extract. We observe that both the wave and particle properties within a Mach–Zehnder interferometer can naturally be quantified by QFI. Firstly, the particle property can be quantified by how