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Band topology and symmetry in pseudo-Hermitian systems Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-03-06 Mostafa Karami, Ebrahim Sadeghi, Parsa Zamani
Pseudo-Hermiticity ramifies novel symmetries and enriches unique topological phases distinct from existing non-Hermitian frameworks. Here, we introduce new types of pseudo-Hermitian models across various spatial dimensions, constructed based on the q-deformed Clifford algebra. Each model preserves specific symmetries, and we characterize their band topology via (Abelian and non-Abelian) quantum metric
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Subwavelength acoustic topology frequency band regulation based on symmetric site-space folded resonant cavities Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-03-05 Jiangxia Luo, Xiao Liang, Jiaming Chu, Haofeng Liang, Daxiang Meng, Zhi Zhang, Minhui Shi
Acoustic topological insulators, as a type of acoustic metamaterial, possess special acoustic wave manipulation capabilities. However, an acoustic topological insulator based on Bragg scattering requires its lattice constant to be equivalent to the wavelength. This means that constructing acoustic topological insulators efficiently in the low-frequency range is a challenge. To this end, this paper
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The local electronic interaction and strain effects on transverse dynamical spin susceptibility of β-graphyne Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-03-01 H. Rezania, M. Abdi, B. Astinchap, E. Nourian
We present the behaviors of dynamical transverse spin susceptibilities of undoped -graphyne monolayer using the Green’s function approach in the context of Hubbard model Hamiltonian. Such dynamical spin susceptibility is proportional to inelastic cross section of neutron beam from the layer. Specially, the effects of magnetic field, on-site coulomb repulsion strength and strain parameter on the spin
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Optomechanically induced transparency and photon blockade in a graphene coupled nonlinear photonic crystal nanobeam cavity based optomechanical system Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-28 Arumay Parai, Debabrata Ganthya, Paresh Chandra Jana
In this article we study tunable optically induced transparency and photon blockade in an optomechanical system comprising a suspended single-layer graphene sheet above a one-dimensional photonic crystal nanobeam cavity above which a single layer graphene sheet is suspended where optomechanical coupling exist not only between photonic and mechanical modes of nanobeam, but also between the photonic
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A new type of core-shell nanowire array structured quantum dot-composite perovskite solar cell with near full-spectrum absorption Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-27 Yin Ren, Yunfei He, Sisi Li, Yahong Wang, Lin He, Peng Ye, Luming Zhou, Rongli Gao, Gang Chen, Wei Cai, Chunlin Fu
The core-shell structured nanowire array solar cell has a larger absorption area and enhanced light capturing capability, thus enabling more efficient absorption of solar energy. By using perovskite materials as the absorber material, it can effectively absorb ultraviolet light and a portion of visible light, but its absorption capacity for red light and infrared light is relatively weak. Quantum dots
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Temperature and pressure dependent tunable GaAsSb/InGaAs QW heterostructure for application in IR-photodetector Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-27 Wahid Ali, A.M. Quraishi, Kajal Kumawat, Mohammad Ehtisham Khan, Syed Kashif Ali, Anwar Ulla Khan, Abdullateef H. Bashiri, Mohammed Ezzeldien, Sandhya Kattayat, P.A. Alvi
A temperature and pressure dependent tunable type-II DQW (double quantum well) heterostructure with the specific composition and combination of InGaAs, InGaAs and GaAsSb layers have been designed and analyzed for the purpose of designing the QW infrared photodetector. Using k.p. theory, the optical response for the optimized heterostructure is investigated as optical absorption. The electronic and
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Preparation and room-temperature hydrogen sensing property of flower-like In2O3/SnS2 nanocomposite Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-27 Mengwei Li, Xueya Sun, Yihui Wang, Cong Qin, Jianliang Cao, Yan Wang
As one of the important sources of pollution-free clean energy, hydrogen has attracted great attention. However, hydrogen molecules are very small and prone to leakage during production, transmission and usage. Therefore, it has become a trend to design room temperature hydrogen sensor. In this work, a novel InO/SnS sensitive material was synthesized by hydrothermal method. The morphology and chemical
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Janus molybdenum di-chalcogenides based van der Waals bilayers for supercapacitor electrode design- effects of interlayer stacking orientations on quantum capacitance Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-26 Naresh Bahadursha, Geetika Bansal, Aditya Tiwari, Ankur Bhattacharjee, Sayan Kanungo
In this work, for the first time, the quantum capacitance of an artificial two-dimensional (2D) material system based on van der Waals (vdW) bilayer heterostructures of Janus Molybdenum Di-chalcogenides, MoXY (X≠Y, X/YS, Se, Te) have been extensively investigated for electrode design of electrical double-layer (EDL) supercapacitor. The effects of different interlayer stacking orientations on local
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Computational insights of promising Pd atomic clusters modified WS2 for detecting environmentally toxic gases Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-20 Linghao Zhu, Cong Qin, Yan Wang, Jianliang Cao
Developing highly sensitive, power-efficient, and recoverable materials are significant for the detection of toxic gases in the environment. Herein, a comprehensive computation of the CH, CO, HS, NH, NO, and NO adsorption performance for the intrinsic and Pd atomic clusters decorated WS (Pd/WS, n = 1–4) was carried out using density functional theory. The larger adsorption energies and more charge
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Magnetoinduced spin Nernst effect in topological nodal-line semimetals Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-19 Ning-Xuan Yang, Xue-Yan Cheng, Rui Wang, Hui Liao, Chun-Yan Song, Ting Fan
The spin Nernst effect (SNE) of a topological nodal-line semimetals (TNLSMs) nanowire in a four-terminal cross-bar device is studied. Based on the nonequilibrium Green’s function method combining with the tight-binding Hamiltonian, the spin Nernst coefficients , and of the two thermal transport models (- case and - case) under a perpendicular magnetic field are obtained. The traditional SNE describes
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Electronic Properties of Ultrathin InGaN/GaN Heterostructures under the Influences of Laser and Electric Fields: Investigation of the Harmonic and Inharmonic Potentials Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-19 Redouane En-nadir, Haddou El Ghazi, Mohamed A. Basyooni-M. Kabatas, Mohammed Tihtih, Walid Belaid, Hassan Abboudi, Ibrahim Maouhoubi, Mohamed Rabah, Izeddine Zorkani
Defects and impurities within semiconductor materials pose significant challenges. This investigation scrutinizes the response of a single dopant donor impurity located in nanostructured semiconductors, specifically quantum wells subjected to both harmonic and inharmonic confinement potentials. The primary focus of this inquiry centers on the analysis of binding energy, electron probability distribution
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Computation insights of kagome structure for probing electronic and thermodynamic properties by applying external factors such as strain, spin-orbital coupling, and external magnetic field Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-15 Mahtab Jamshidipour, Mona Abdi, Bandar Astinchap
In this study, we explored the electronic properties of a two-dimensional (2D) kagome lattice in the presence of an external magnetic field, spin-orbit coupling (SOC), and strain. Our focus was on investigating the energy-dependent behavior of the electronic heat capacity and paramagnetic spin susceptibility in response to changing factors. Employing the Green's function approach, we successfully determined
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Magnetization spiral structure and high domain wall velocity induced by inertial effect Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-15 Zai-Dong Li, Xue-Meng Nan, W.M. Liu
In ultrafast magnetism, i.e., the short time scales such as picosecond and femtosecond, we report that the spiral structure of magnetization can be formed by the inertial effect. Comparing with the case of fast magnetism in nanosecond time scale, we can obtain a higher velocity of domain wall in ultrafast magnetism due to the driving of inertial moment. There is a critical value of angular momentum
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The influence of annealing environment of ZnO thin film on its optical, structural and photovoltaics performance Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-15 A.K. Abisheva, D.A. Afanasyev, B.R. Ilyassov, A.K. Aimukhanov, V.A. Kulbachinskii, A.K. Zeinidenov
For inverted organic solar cells (IOSC), the interface contacts between the ZnO electron transport layer and the organic active layer play an important role in device performance and stability. The light absorption effect is one of the major disadvantages of IOSC when metal oxides are used as the electron transport layer (ETL). Oxide ETL primarily causes the above effect due to the energy barrier,
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Tri-channel independent switching terahertz filter based on metal-graphene hybrid coding metasurface Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-14 Yufan Zhang, Longhui Zhang, Chenyue Xi, Fangrong Hu, Mingzhu Jiang, Yumin Gong, Hong Wang, Zengxiu Zhao
Terahertz (THz) filters are the core devices for practical application in THz communication technology. Recently, design of multi-channel filters with high modulation rates remains to be a challenge. In this paper, a three channels switchable THz filter based on metal-graphene hybrid metasurface is proposed. The unit cell is consisted of "n"-shaped and "u"-shaped split-ring resonators (SRRs) with different
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On the plasmonic properties of a graphene nanoribbon and noble metal composite array Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-14 Qinxiu Zhang, Yue Zhang, Ting Wang, Tao Xiong, Wei Wang, Cheng Sun
Graphene, composed of hybrid orbitals, is a hexagonal nanomaterial with a two-dimensional honeycomb lattice structure. Nowadays, thanks to its great electronic, optical, and thermal properties, there have been many promising applications based on graphene nanostructures. Under irradiations of external electromagnetic fields, the free electrons on graphene surfaces can be excited to oscillate collectively
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Physical insight into optical spectroscopy of chiral covalent organic pillars as molecular nanotubes Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-12 Siqi Zhou, Mengtao Sun, Youjin Zheng
In this paper, we theoretically investigate chiral covalent organic pillars synthesized by connecting rim-desymmetrized macrocycle, stimulated by recent experimental synthesis [ 2023, , 395–402]. Transition densities reveal physical mechanism of spectral intensity in one-photon absorption (OPA) and two-photon absorption (TPA), and solvent effect strongly influence the spectral profile and intensity
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Quantum entropies of realistic states of a topological insulator Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-05 Nicolás Legnazzi, Omar Osenda
Nanowires of BiSe show topological states localized near the surface of the material. The topological nature of these states can be analyzed using well-known quantities. In this paper, we calculate the topological entropy suggested by Kitaev and Preskill for these states together with a new entropy based on a reduced density matrix that we propose as a measure to distinguish topological one-electron
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Direct correlation between electronic and optical properties of the XC monolayers (X= Si, Ge, and Sn) from first-principles calculations Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-05 Nguyen Thi Han, Tu Le Manh, Vo Khuong Dien
In this study, the geometric, mechanical, electronic, and optical properties of two-dimensional XC (X = Si, Ge, Sn) monolayers are investigated using first-principles calculation based on density functional theory (DFT) and the many-body perturbation calculation (GW-BSE). The physical and chemical characteristics, along with orbital hybridizations in all Si–C, Ge–C, and Sn–C chemical bonds are presented
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Quantized topological charges of antiferroelectric skyrmions in two-dimensional multiferroic materials Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-02 Zhaosen Liu, Hou Ian
Magnetic skyrmions can be generated, destroyed and driven to motion by electric spin currents in metals based on the spin transfer torque (STT) mechanism. However, the STT technique does not work in insulating materials because no electric currents can pass through. Fortunately, the magnetoelectric (ME) interaction that is present in multiferroic insulators makes it possible to manipulate magnetic
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Electric and thermoelectric response for Weyl and multi-Weyl semimetals in planar Hall configurations including the effects of strain Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-01-31 Rahul Ghosh, Ipsita Mandal
We investigate the response tensors in planar Hall (thermal Hall) configurations such that a three-dimensional Weyl or multi-Weyl semimetal is subjected to the influence of an electric field E (temperature gradient ∇rT) and an effective magnetic field Btot oriented at a generic angle with respect to each other. The effective magnetic field consists of two parts—(a) an actual/physical magnetic field
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Enhancing valley polarization of a MoS2 zigzag nanoribbon using double magnetic barriers Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-01 Daehan Park, Heesang Kim, Nammee Kim
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Structural and optical characteristics of undoped and Eu3+ doped MgZn2 (PO4)2 nanopowder Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-01 K. Daniel, B.V. Naveen Kumar, Y. Nirmal Rajeev, K. Venkatarao, Sandhya Cole
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Evidence of ferromagnetic behaviour in carbon nanospheres synthesised by the chemical vapour deposition technique Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-01 Othmane Mouane, Elias Sideras-Haddad, Daniel Wamwangi, Victor Mashindi, Gerrard Peters, Rudolph M. Erasmus, Deena Naidoo, Theodoros Gkanetsos, Neil J. Coville
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Efficient sensor based on CeCo3O6 nanocomposite for the electrochemical detection of cadmium and copper ions Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-02-01 Samah A. Alghamdi, Taghreed M. Fagieh, Esraa M. Bakhsh, Kalsoom Akhtar, Sher Bahadar Khan, Effat A. Bahaidarah
Today, the world is in a constant need to monitor environmental pollutants especially water contamination with heavy metals that causes health problems for human beings and other organisms. Therefore, many different analytical techniques have been developed to detect these toxic elements accurately. Since of their high level of sensitivity as well as low detection limit, electrochemical sensors are
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Effect of tensile strain on the electronic structure, optical absorptivity, and power conversion efficiency of the BC6N/ZnO van der Waals heterostructure Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-01-29 Wei Han, You Xie, Yu-Ling Song, Ning-Ning Jiang, Xin-Wen Jin, Su-Fang Wang, Li-Yong Chen, Xiao-Sa Xiao, Zheng-Yong Chen, Jiang-Jie Gan
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High performance photodetector based on WSe2 p-n homojunction induced by the electron doping from Bi2O2Se Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-01-28 Fangchao Lu, Jun Gao, Heng Yang, Qian Zhao, Jiajun Deng, Xiaolong Liu, Wenjie Wang, Sidi Fan
Compared with heterostructure engineering, which not only requires a complex alignment process but also inevitably introduces defects in the material preparation processes, the homojunction design advantages a clean interface that is beneficial to the device performance. In this work, in order to realize a 2D material-based p-n junction with a clean interface, a transverse WSe2 homojunction is constructed
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Single-step synthesis of carbon nanotubes-nickel cobaltite (CNT-NiCo2O4) by thermal decomposition of cyanide compounds for electrochemical sensing applications Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-01-24 El-shazly M. Duraia, Babatunde M. Adebiyi, Sayantan Das, Hend S. Magar, Gary W. Beall, Rabeay Y.A. Hassan
In this study, a new approach is presented for the synthesis of carbon nanotubes-nickel cobaltite (CNT-NiCo2O4) via thermal decomposition of cobalt-nickel cyanide (Co[Ni(CN)4]). It is well known that metal bridged cyanide compounds have a layered structure with water molecules intercalated in between these layers. Through the aerobic heating of CoNiCN4 powder at 400 °C, a wave-like pattern of ignition
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Thin film Weyl semimetals with turning number of Fermi surface greater than unity Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-01-23 Naveen Yadav, Nivedita Deo
The development of Weyl semimetals (WSMs) as a new type of quantum material for a variety of novel phenomena is underway. In this context WSM with broken time reversal symmetry and inversion symmetry confined to a thin film which exhibits topologically distinct Fermi surface in the low energy regime is presented. The equi-energy contours possess a topological invariant called turning number ν. We extend
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Resonance and Anti-resonance in transport through quantum dots-Majorana bound states hybrid structure Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-01-18 Muhammad Aslam, D. Sivaganesh, Seyede Zahra Naeimi, Homa Shababi, M. Kashif Masood, Anatoly Zatsepin, SaravanaVadivu Arunachalam
We calculate the linear conductance through a double quantum-dot system with a normal metal lead, which is enclosed in a closed shape where quantum dot-1 is connected to Majorana bound states (MBSs). The Quantum dots configuration from parallel to series allows for a transition in the shape of resonant to non-resonant in the spectrum. This is caused by quantum interference between the energy levels
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Biaxial strain and magnetic field effects on electronic and optical properties of β-graphyne structure Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-01-18 H. Rezania, E. Nourian, M. Abdi, B. Astinchap
We compute electronic density of states, thermodynamic and optical conductivities of β-graphyne layer under applying biaxial strains. Particularly, the imaginary part of dielectric constant, which is proportional to the electromagnetic wave absorption rate, of β-graphyne due to the magnetic field and biaxial strain effects has been calculated. The temperature dependence of Pauli spin susceptibility
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Study on the effects of anisotropic effective mass on electronic properties, magnetization and persistent current in semiconductor quantum ring with conical geometry Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-01-18 Francisco A.G. de Lira, Luís Fernando C. Pereira, Edilberto O. Silva
We study a 2D mesoscopic ring with an anisotropic effective mass considering surface quantum confinement effects. Consider that the ring is defined on the surface of a cone, which can be controlled topologically and mapped to the 2D ring in flat space. We demonstrate through numerical analysis that the electronic properties, the magnetization, and the persistent current undergo significant changes
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Structural, morphological, optical, magnetic and impedance spectroscopic properties of Ni0·5Fe2·5O4 nanoparticles synthesized by the self-combustion method Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-01-17 Issa El Heda, Jalel Massoudi, Radhia Dhahri, Fathi Bahri, Essebti Dhahri, Kamel Khirouni, B.F.O. Costa, O.M. Lemine
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Impedance characterization of hydrothermally synthesized nickel zinc ferrite nanoparticles for electronic application Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-01-16 Mustafa Okutan, Muhittin Öztürk, Sonay Okutan, Gürsel Yesilot, Orhan Yalçın, Andreas Bablich, Peter Haring Bolívar
This study comprehensively investigates the structural, morphological, dielectric, and conductivity properties of Ni0.5Zn0.5Fe2O4 nanoparticles synthesized through a hydrothermal method, focusing on their suitability for technological applications. The nanoparticles exhibited a cubic structure with an average grain size of approximately 19 nm. The dielectric properties were analyzed with respect to
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Synthesis, crystal structure, BFDH morphology, Hirshfeld surface analysis and electrical characterization of the new bi-(2-amino-5-methylpyridinium) hexa-chlorostannate compound Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-01-11 I. Garoui, S. Hajlaoui, I. Kammoun, A. Ouasri, J. Lhoste, H. Abid, A. Oueslati
The Organic–inorganic hybrid compounds have attracted considerable attention for their scientific and technological potential according to their wide field application. In this paper, we describe the preparation of a new hybrid crystal, with the structural formula [C6H9N2]2SnCl6, of which crystallographic, BFDH morphology, Hirshfeld and complex impedance spectroscopy have been studied and analyzed
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Influence of structural defect and sample size on thermal conductivity of gallium selenide/graphene Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-01-02 Thi-Bao-Tien Tran, Te-Hua Fang, Dinh-Quan Doan
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Structural, mechanical, and electronic properties of armchair and zigzag germanene nanotubes Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-01-01 Jose A.S. Laranjeira, Pablo A. Denis, Julio R. Sambrano
This computational study investigated germanene nanotubes (GeNTs) using density functional theory (DFT) simulations to comprehend their structural, mechanical, and electronic properties. The analysis includes armchairs and zigzag GeNTs with diameters from ∼7 to ∼221 Å. It explores their relative stabilities, band structures, density of states, effective mass carriers, and piezoelectric and elastic
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Chiral tunneling through double barrier structure in twisted graphene bilayer Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2024-01-02 A. Bahlaoui, Y. Zahidi
The paper discusses the chiral tunneling of charge carriers through double barrier structure in twisted graphene bilayer. The theoretical analysis investigates the transmission probability for various system parameters under both symmetric and asymmetric barrier conditions. The results reveal that the transmission probability of quasiparticles in the K cone is mirror symmetric to that of Kθ cone about
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Nanodevice simulations and electronic transport properties of a two-dimensional PbBr2 monolayer Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-12-28 Yilian Li, Yi Wu, Xiaozheng Fan, Mehrdad Shiri, Kun Wang, Chunlan Ma, Shijing Gong, Xiao Dong, Guoliang Xu, Tianxing Wang, Yipeng An
Two-dimensional (2D) wide bandgap semiconductors are promising blocks for applications in photodetections, spintronics and high energy radiation detection. Here, we probe the mechanical, biaxial strain-relate, electronic transport, and optoelectronic properties of PbBr2 monolayer with wide bandgaps using first-principles calculations. The 2D Young's modulus of PbBr2 monolayer is determined to be 14
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High Performance Sub-10nm Si-doped MoS2 based Step Structure DG-TFET Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-12-27 Priya Kaushal, Gargi Khanna
Two-dimensional (2D) nanomaterials, which include Molybdenum Disulfide (MoS2), are the focus research because of the wide possibilities of application in electronic and optoelectronic devices. Nanomaterials have potential use in high-performance transistors. The main objective of this study is to examine and evaluate a Silicon (Si)-doped MoS2 Step Structured Tunnel Field Effect Transistor (MoS2-SS-TFET)
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Ohmic contact in two-dimensional WS2/Hf2CX2 (X = F/OH) and WS2/graphene/Hf2C heterojunctions Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-12-26 Mengjie Li, Jing Chen, Tongwei Li, Mengshuo Kang, Xinxin Wang, Haisheng Li, Weiwei Ju
Low-resistance Ohmic contacts are the key to improving the performance of electronic devices. By performing ab initio electronic calculations and quantum transport simulations, we systematically investigate the contact types of the original WS2/Hf2C, the functionalized WS2/Hf2CX2 (X = F/OH), and the graphene-doped WS2/graphene/Hf2C heterojunctions. The obtained results suggest that the strong interfacial
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Actively modulating near-infrared absorption of monolayer graphene in a compound grating-coupled waveguide structure Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-12-29 Luchi Tang, Junxue Chen, Tao Tang, Liu Wang, Zhonggang Xiong
In this work, we numerically study the tunable light absorption of monolayer graphene at the near-infrared region by the guided mode resonance in a compound grating-coupled waveguide structure. A biased graphene capacitor is placed below the coupled waveguides. The electromagnetically induced transparency phenomenon is demonstrated by the resonant coupling of guided modes. The light absorption of monolayer
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Metallic–insulator phase transitions in the power-law modulated Harper model Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-12-29 João Chakrian, Marcelo L. Lyra, Jonas R.F. Lima
In this work we investigate the transport properties of non-relativistic quantum particles on incommensurate multilayered structures with the thicknesses wn of the layers following a power-law modulated Harper model given by wn=w0|cos(πanν)|. For the normal incidence case, which means an one-dimensional system, we obtained that for a specific range of energy, it is possible to see a metallic–insulator
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Structural, optical and electrical properties of Al-doped CdO nanoparticles by solid state reaction Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-12-29 Arcot Jaswanth, Shaik Kaleemulla
In the present study, aluminium doped cadmium oxide (Cd1-xAlxO) nanoparticles at (x = 0.00, 0.03, 0.05 & 0.07) concentrations were prepared using solid-state reaction and synthesized nanoparticles were subjected to different characterisations such as X-ray diffractometer (XRD), UV–Vis-Spectrophotometer (UV–Vis–NIR), field emission scanning electron microscopy (FE-SEM), Fourier Transform Infrared Spectroscopy
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Nickel doped ZnO nanoparticles as a novel photocatalytic and multiferroic semiconductor Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-12-27 Anindita Samanta, M.N. Goswami, P.K. Mahapatra
Structural analysis, spectroscopic studies and multiferroic properties of Zn1-xNixO (x = 0, 0.03, 0.06, 0.09, 0.12, 0.15) nanoparticles are reported here. Ni-doped ZnO nanoparticles were synthesized through a simple chemical growth route using hydroxyoxalate type materials. The hexagonal wurtzite structure of prepared compounds has been ascertained through X-ray diffraction. High Resolution Transmission
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Real-space tight-binding model for twisted bilayer graphene based on mapped Wannier functions Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-12-19 Mahyar Servati, Reza Rasuli, Ali Tavana
Twisted multi-layer heterostructures have been considered a platform for studying highly correlated many-particle systems, hosting the emerging phenomena of correlation physics. Electronic structure calculations of such materials which mainly focused on Twisted Bilayer Graphene (TBG) in the framework of the independent-electron approximation, despite the complexity, accurately match the experimental
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Intrinsic valley polarization and anomalous valley Hall effect in monolayer H-ScAt2 Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-12-21 Yingzhi Ye, Xiaolei Song, Zhanhui Yuan, Jun Wang, Bingwen Zhang
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Spin-phonon coupling driven magnetodielectric effect in low-dimensional complex magnetic BaGdFeO4 system Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-12-23 C.H. Prashanth, D. Chandrasekhar Kakarla, Ajay Tiwari, Aprajita Joshi, Surajit Saha, H.D. Yang, Krishnamurthy Jyothinagaram
In this report, we have investigated the detailed magnetodielectric properties associated with spin-phonon coupling in the BaGdFeO4 polycrystalline compound, X-ray diffraction study confirms the orthorhombic crystal structure with a space group of Pnma. The DC magnetization measurements indicate the complex magnetic behavior with multiple magnetic transitions at TN1 = 62 K and TN2 = 31 K. In the field-dependent
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Controlling spin polarization of gapless states in defected trilayer graphene with a gate voltage Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-12-18 W. Jaskólski
Trilayer graphene exhibits valley-protected gapless states when the stacking order changes from ABC to CBA and a gate voltage is applied to outer layers. Some of these states survive strong distortions of the trilayer. For example, they persist when the outer layers are partially devoid yielding a system of two trilayers of different stacking order connected by a strip of a single graphene layer. Here
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Giant excitonic magneto-optical Faraday rotation in single semimagnetic CdTe/Cd1-xMnxTe quantum ring Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-12-16 Kalpana Panneerselvam, Bhaskaran Muralidharan
Magnetic tuning of the bound exciton states and corresponding giant Zeeman splitting (GZS) between σ+ and σ− excitonic transitions in CdTe/Cd1-xMnxTe quantum ring has been investigated in the Faraday configuration for various concentrations of Mn2+ ions, using the variational technique in the effective mass approximation. The sp-d exchange interaction between the localized magnetic impurity ions and
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Multiband k⋅p model for Monalayer SnX2(X=S,Se) Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-12-04 Minghui Wu, Dongli Meng
Multiband k⋅p models have been constructed for the monolayer SnX2(X=S,Se) based on the symmetry consideration alone. Two conductance and ten valence bands are included capable of describing the energy band dispersion, spin–orbit coupling, and strain effect, in good agreement with the first-principle results. Spin–orbit coupling strength has been confirmed. Interestingly, the valence bands show enormous
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Transport properties in gapped graphene through magnetic barrier in a laser field Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-11-30 Rachid El Aitouni, Miloud Mekkaoui, Ahmed Jellal, Michael Schreiber
We study the transport properties of Dirac fermions through gapped graphene through a magnetic barrier irradiated by a laser field oscillating in time. We use Floquet theory and the solution of Weber’s differential equation to determine the energy spectrum corresponding to the three regions composing the system. The boundary conditions and the transfer matrix approach are employed to explicitly determine
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Trace level sensitivity and selectivity of room temperature NH3 gas sensors based on RGO/ZnO@SiNWs heterostructure Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-12-01 Sonia Yogi, Avshish Kumar, Pramod Kumar, Vivek Kumar, Mohammad Zulfequar, Vinod Kumar Jain
Ammonia (NH3) is one of the most common gaseous pollutants in various environmental and industrial processes which is accountable for various health issues, even for life-threatening situations. Due to this, high-precision detection of NH3 has become a top priority for various sectors so that healthy and safe environment could be ensured. Therefore, this work aims to develop a simple, reliable, and
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Optical phonons in quantum well with anisotropic permittivity Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-12-01 V.Ya. Aleshkin, M.S. Zholudev
The dielectric continuum model has been developed to describe the optical phonons in quantum well with anisotropic permittivity. The developed model is used to calculate the spectra and potentials of the optical phonons in a CdHgTe/HgTe heterostructure with narrow-gap quantum wells.
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Conduction mechanism of Gd2O3 induced by CO2 under in-field conditions Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-11-29 Ion V. Dinu, Cristian E. Simion, Nicoleta G. Apostol, Ovidiu G. Florea, Catalina G. Mihalcea, Adelina Stanoiu
This work investigates the conduction mechanism of hydrothermally grown Gd2O3-sensitive material in order to explain its electrical resistance behaviour when exposed to increasing concentrations of CO2 under in-field conditions. To achieve this, the experimental investigation began with X-ray photoelectron spectroscopy of the Gd2O3 microstructure to verify the oxidation states of the surface. Subsequently
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Quantum entanglement in non-Hermitian Hubbard model Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-11-18 L.S. Lima
Quantum correlation, entanglement in the non-Hermitian Hubbard model where the non-Hermiticity led to a series of exotic phenomena when the system experiences dissipation to an environment on bipartite lattice is studied. Quantum entanglement measures given by the entanglement negativity and entropy of the density matrix have been analyzed. We investigate the effect of non-Hermitian imaginary hopping
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Influence of S vacancy and O doping in MoS2/GaN heterostructure on charge carrier dynamics: A time-domain ab initio study Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-11-17 Zheng Li, Shuhong Ma, Zhaoyong Jiao
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Effect of Andreev processes on the Goos–Hänchen (GH) shift in the Graphene–Superconductor–Graphene (GSG) junctions Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-11-07 Shahrukh Salim, Rahul Marathe, Sankalpa Ghosh
In this article, we study the transport properties of Graphene–Superconductor–Graphene (GSG) heterojunction where the superconducting region is created in the middle of a graphene sheet, as contrasted to widely studied transport properties through a Superconductor–Graphene–Superconductor (SGS) type of Josephson junction. We particularly analyse in detail the Goos–Hänchen shift of the electron and the
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Penta graphene: Investigating the role of external fields and electron/hole doping in enhancing transport performance Physica E Low Dimens. Syst. Nanostruct. (IF 3.3) Pub Date : 2023-11-09 Raad Chegel, Somayeh Behzad
This comprehensive study utilizes the full tight-binding model and Green's function approach, employing the linear response theory, to investigate the electronic and thermal conductance of penta-graphene (PG) under various external parameters such as bias voltage, magnetic field, and doping. The results reveal that these parameters significantly enhance the thermoelectric properties of PG through modifications