Physica E-low-dimensional Systems & Nanostructures最新文献

Effect of the tilt on the three-dimensional quantum Hall effect in tilted Weyl semimetals 倾斜对倾斜Weyl半金属中三维量子霍尔效应的影响

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-05-27 DOI: 10.1016/j.physe.2025.116289

Mingqi Chang , Rong Ma , Li Sheng

{"title":"Effect of the tilt on the three-dimensional quantum Hall effect in tilted Weyl semimetals","authors":"Mingqi Chang , Rong Ma , Li Sheng","doi":"10.1016/j.physe.2025.116289","DOIUrl":"10.1016/j.physe.2025.116289","url":null,"abstract":"<div><div>Three-dimensional (3D) quantum Hall effect (QHE) in Weyl semimetal has attracted intense interests recent years. In this paper, we theoretically investigate the 3D QHE in tilted Weyl semimetals from bulk states for magnetic field parallel to the separation of Weyl nodes. According to the correspondence between bulk Chern number and Hall conductivity, we analytically calculate the Hall conductivity as a function of Fermi energy and the tilted terms in a thin film of a tilted Weyl semimetal using periodic boundary condition. The width of the Hall plateaus as a function of Fermi energy is influenced by the tilted terms and the energy gap between the <span><math><mrow><mi>n</mi><mo>=</mo><mo>−</mo><mn>1</mn></mrow></math></span> and <span><math><mrow><mi>n</mi><mo>=</mo><mn>1</mn></mrow></math></span> Landau levels (LLs). When the two Weyl nodes tilt to the same direction and tilt away from each others, the plateau width decreases as a quadratic function and linear function respectively as the tilt increases. When the two Weyl nodes tilt towards to each other, the plateau width increases as a linear function. However, the width is limited by the energy gap between the <span><math><mrow><mi>n</mi><mo>=</mo><mo>−</mo><mn>1</mn></mrow></math></span> and <span><math><mrow><mi>n</mi><mo>=</mo><mn>1</mn></mrow></math></span> LLs which decreases as the tilt increases. We also numerically calculate the Hall conductivity using open boundary condition and the numerical results show well consistent with the analytical results. Our study can be significant for understanding the effects of tilt on the 3D QHE in tilted Weyl semimetals.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"173 ","pages":"Article 116289"},"PeriodicalIF":2.9,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of phonon focusing on the anisotropy of the drag thermopower in single-crystalline nanowires based on noble metals 声子聚焦对贵金属单晶纳米线拖曳热能各向异性的影响

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-05-23 DOI: 10.1016/j.physe.2025.116298

I.I. Kuleyev, I.G. Kuleyev

{"title":"Influence of phonon focusing on the anisotropy of the drag thermopower in single-crystalline nanowires based on noble metals","authors":"I.I. Kuleyev, I.G. Kuleyev","doi":"10.1016/j.physe.2025.116298","DOIUrl":"10.1016/j.physe.2025.116298","url":null,"abstract":"<div><div>We have investigated the influence of phonon focusing on the electron-phonon drag and thermopower in Au-, Ag-, and Cu-based nanowires at low temperatures. Also, we have examined the role of quasi-longitudinal and quasi-transverse phonons, as well as shear waves in the drag thermopower of the nanostructures. The anisotropy of the lattice drag thermopower, thermal conductivity, and phonon mean free paths in noble metal-based nanowires is analyzed in the Knudsen phonon gas flow regime. In this case, the drag thermopower of nanowires follows the temperature dependence <span><math><mrow><msub><mi>α</mi><mtext>drag</mtext></msub><mo>∼</mo><msup><mi>T</mi><mn>4</mn></msup></mrow></math></span>, with a dominant contribution of the slow quasi-transverse <em>t</em><sub>2</sub>-mode for all heat flux directions. It is shown that, under conditions of competition between boundary and volume mechanisms of phonon relaxation, the anisotropy of the drag thermopower in Ag crystals decreases monotonically as the cross-section of nanowires increases and disappears when the cross-section is <span><math><mrow><mi>D</mi><mo>></mo><msup><mn>10</mn><mn>2</mn></msup></mrow></math></span> μm.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"173 ","pages":"Article 116298"},"PeriodicalIF":2.9,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrigendum to ‘Electric and thermoelectric response for Weyl and multi-Weyl semimetals in planar Hall configurations including the effects of strain’ [Phys. E 159 (2024) 115914] “平面霍尔结构中Weyl和多Weyl半金属的电和热电响应，包括应变的影响”的更正[物理学]。E 159 (2024) 115914]

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-05-22 DOI: 10.1016/j.physe.2025.116282

Rahul Ghosh , Ipsita Mandal

引用次数: 0

The effect of nonlinear spin-orbit interaction on decay and recovery of 2D injected electrons spin polarization and velocity quantum oscillations 非线性自旋轨道相互作用对二维注入电子自旋极化和速度量子振荡衰减和恢复的影响

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-05-21 DOI: 10.1016/j.physe.2025.116286

N.S. Maslova , P.I. Arseyev , V.N. Mantsevich

{"title":"The effect of nonlinear spin-orbit interaction on decay and recovery of 2D injected electrons spin polarization and velocity quantum oscillations","authors":"N.S. Maslova , P.I. Arseyev , V.N. Mantsevich","doi":"10.1016/j.physe.2025.116286","DOIUrl":"10.1016/j.physe.2025.116286","url":null,"abstract":"<div><div>We have theoretically studied the dynamics of spin <span><math><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></math></span> charged particles injected into a two-dimensional system with spin-orbit interaction in the presence of a perpendicular magnetic field, focusing on the role of the nonlinear part of the spin-orbit coupling. We showed that the spin polarization of these particles exhibits quantum oscillations, decay (collapses), and recovery (revivals), and can be effectively controlled due to the contribution from the nonlinear terms in the spin–orbit interaction. The presence of the nonlinear component of the spin-orbit coupling leads to more prominent oscillations in the particles’ spin polarization, resulting from the phase-locked motion of the particles, or to the emergence of chaotic behavior due to dephasing effects, depending on the system’s parameters. We have also analyzed the velocity dynamics of the charged particles and identified a beating regime when time intervals with constant velocity are alternated with time intervals of oscillating velocity amplitudes.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"172 ","pages":"Article 116286"},"PeriodicalIF":2.9,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144116447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magneto-optical absorption properties of silicene: Equations of motion method 硅烯的磁光吸收特性：运动方程法

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-05-19 DOI: 10.1016/j.physe.2025.116290

Nguyen N. Hieu , Vo T. Anh Thu , Dao T. Tien , Nguyen T. Tam , Huynh V. Phuc

{"title":"Magneto-optical absorption properties of silicene: Equations of motion method","authors":"Nguyen N. Hieu , Vo T. Anh Thu , Dao T. Tien , Nguyen T. Tam , Huynh V. Phuc","doi":"10.1016/j.physe.2025.116290","DOIUrl":"10.1016/j.physe.2025.116290","url":null,"abstract":"<div><div>In this study, we explore the magneto-optical response of monolayer silicene subjected to perpendicular electric and magnetic fields by analyzing its optical response functions derived through the equation of motion approach. Both intraband and interband transitions are analyzed in detail. Our results show that the absorption spectrum is highly sensitive to the electron density, which controls the Fermi level and thereby determines the possible optical transitions. At high electron densities, the first interband transition peak shifts to higher energies, while the intraband peaks become more pronounced due to the reduced transition energies. The response also shows strong polarization dependence: left-handed circular polarization enhances absorption, while right-handed polarization suppresses it. A characteristic “half-peak” structure arises from asymmetric Pauli blocking. Magnetic fields effectively modulate peak positions and intensities, whereas electric fields play a lesser role under strong quantization. These findings highlight silicene’s tunability for infrared and terahertz optoelectronic applications.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"172 ","pages":"Article 116290"},"PeriodicalIF":2.9,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144105777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

First-principles exploration of novel two-dimensional CrAl2S4 monolayer with high spin polarization 新型二维高自旋极化CrAl2S4单层的第一性原理探索

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-05-17 DOI: 10.1016/j.physe.2025.116296

Haiming Huang , Ziyu Liu , Mingyang Yang , Xuejing Yang , Cheng Liu , Yongjin Hu , Jie Chen , Yonghong Hu , Amel Laref

{"title":"First-principles exploration of novel two-dimensional CrAl2S4 monolayer with high spin polarization","authors":"Haiming Huang , Ziyu Liu , Mingyang Yang , Xuejing Yang , Cheng Liu , Yongjin Hu , Jie Chen , Yonghong Hu , Amel Laref","doi":"10.1016/j.physe.2025.116296","DOIUrl":"10.1016/j.physe.2025.116296","url":null,"abstract":"<div><div>Based on first-principles calculations, we have designed a novel two-dimensional material, CrAl<sub>2</sub>S<sub>4</sub> monolayer, which is isomorphic to MoSi<sub>2</sub>N<sub>4</sub>. The CrAl<sub>2</sub>S<sub>4</sub> monolayer is a half-metallic magnetic material with 100 % spin polarization in the equilibrium, and the Curie temperature is predicted to be 305 K. The phonon dispersion spectrum and molecular dynamics ensure the dynamic stability of this monolayer material. The research results show that CrAl<sub>2</sub>S<sub>4</sub> monolayer exhibits very robust half-metallicity under strain modulation. Notably, when a compressive strain of −3 % is applied, CrAl<sub>2</sub>S<sub>4</sub> monolayer transforms into a spin gapless semiconductor that also has a 100 % spin polarization. The results considering the Hubbard correction indicate that CrAl<sub>2</sub>S<sub>4</sub> monolayer either exhibits half-metallic characteristics or behaves as a spin gapless semiconductor. The calculations of the magnetic anisotropy energy show that CrAl<sub>2</sub>S<sub>4</sub> monolayer has a relatively large magnetic anisotropy energy along the (001) direction. The high spin polarization rate, robust half-metallicity, tunable electronic structures, and significant magnetic anisotropy exhibited by CrAl<sub>2</sub>S<sub>4</sub> monolayer indicate that it is a progressing material with great potential for application in spintronic devices.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"172 ","pages":"Article 116296"},"PeriodicalIF":2.9,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hybridization of three types topological states in graphene plasmonic crystals 石墨烯等离子体晶体中三种拓扑态的杂化

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-05-15 DOI: 10.1016/j.physe.2025.116293

Bangyu Li , Shengqun Guo , Shiqi Qiu , Lei Xu , Weibin Qiu

引用次数: 0

Singlet-triplet splitting and Mollow triplet dynamics in impurity-doped core/shell quantum dots 掺杂核壳量子点的单重态-三重态分裂和Mollow三重态动力学

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-05-14 DOI: 10.1016/j.physe.2025.116292

E.S. Hakobyan , G.A. Mantashian , D.B. Hayrapetyan , P.A. Mantashyan

{"title":"Singlet-triplet splitting and Mollow triplet dynamics in impurity-doped core/shell quantum dots","authors":"E.S. Hakobyan , G.A. Mantashian , D.B. Hayrapetyan , P.A. Mantashyan","doi":"10.1016/j.physe.2025.116292","DOIUrl":"10.1016/j.physe.2025.116292","url":null,"abstract":"<div><div>While previous studies have explored singlet–triplet splitting in quantum dots with various geometries and material compositions for high-fidelity qubit design, core/shell QDs—particularly CdSe/CdS— have not been extensively investigated for this purpose. Given their advantageous optical properties, this study aims to investigate the electronic and optical behavior of a two-electron system confined in a CdSe/CdS core/shell QD modeled with a Woods–Saxon potential, incorporating a monovalent off-center impurity. We analyze how the singlet–triplet energy splitting depends on the core-to-shell size ratio and explore the system's response to external electric fields.</div><div>Using the effective mass approximation and perturbation theory, we show that for a core radius of 0.5 nm, increasing the shell thickness from 0.5 nm to 2 nm reduces the singlet–triplet splitting from 0.245 eV to 0.085 eV (a 65.3 % decrease). For a 2 nm core, the reduction is smaller—28.4 %—indicating weaker confinement effects. The dynamics under an external electric field reveal Rabi oscillations with tunable frequency and amplitude; increasing the field from 0.5 to 2 kV/cm shortens the oscillation period from ∼0.10 ps to ∼0.05 ps. At field strengths above 1.5 kV/cm, the triplet state becomes more probable than the singlet state during certain time intervals. We also analyze the Mollow triplet evolution and find that sideband separation grows proportionally with the Rabi frequency. These results highlight the tunability of singlet–triplet transitions in CdSe/CdS QDs, offering promising avenues for optical control in solid-state quantum information applications.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"172 ","pages":"Article 116292"},"PeriodicalIF":2.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tuning SQ efficiency in MoSSe/WSSe vdW vertical heterostructure: The role of strain and electric fields MoSSe/WSSe vdW垂直异质结构SQ效率的调整：应变和电场的作用

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-05-14 DOI: 10.1016/j.physe.2025.116294

Pradeepsinh J. Jadeja , Himalay M. Kolavada , Sanjeev K. Gupta , P.N. Gajjar

{"title":"Tuning SQ efficiency in MoSSe/WSSe vdW vertical heterostructure: The role of strain and electric fields","authors":"Pradeepsinh J. Jadeja , Himalay M. Kolavada , Sanjeev K. Gupta , P.N. Gajjar","doi":"10.1016/j.physe.2025.116294","DOIUrl":"10.1016/j.physe.2025.116294","url":null,"abstract":"<div><div>We conducted a first-principles study of the MoSSe/WSSe vertical heterostructure using DFT to explore AB stacking with Se-Se at the interfacial position of the structure under Van der Waals (vdW) effect. We first optimized monolayers and vertical heterostructure to investigate it further. The absence of imaginary frequency curves in the phonon dispersion curves and negative binding energy makes it a potential candidate for pragmatic use. Further, in this work, we applied biaxial strain (along X and Y directions) to this heterostructure in the range of −3 % compressive to + 2 % tensile to study the effect on its bandgap and, more importantly, on its Shockley-Queisser (SQ) efficiency. It was evident that the SQ efficiency increases significantly with initial compressive strain such that it peaks at 32.25 % from initial value of 27.05 % for pristine, suggesting this material could be manipulated for solar applications. We have also investigated the J-V characteristics and corresponding power density curves for pristine and strained structures. We also studied the effect of the external electric field on the material for the SQ efficiency prospect. The result indicates that the electric field also causes SQ efficiency to increase up to a staggering 32.25 %. The material exhibits an absorption coefficient on the order of 10<sup>5</sup> cm<sup>−</sup><sup>1</sup> in the visible and near-UV regions of the electromagnetic spectrum, emphasizing its potential for solar energy applications.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"172 ","pages":"Article 116294"},"PeriodicalIF":2.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144105778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Discontinuous Galerkin finite element method for phonon Boltzmann transport equation under Callaway's scattering model Callaway散射模型下声子Boltzmann输运方程的不连续Galerkin有限元法

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-05-14 DOI: 10.1016/j.physe.2025.116295

Xiao-Ping Luo , Jia-Wei Shen , Hong-Liang Yi

{"title":"Discontinuous Galerkin finite element method for phonon Boltzmann transport equation under Callaway's scattering model","authors":"Xiao-Ping Luo , Jia-Wei Shen , Hong-Liang Yi","doi":"10.1016/j.physe.2025.116295","DOIUrl":"10.1016/j.physe.2025.116295","url":null,"abstract":"<div><div>Spatially and temporally dependent solutions of phonon Boltzmann transport equation(BTE) are essential to investigate thermal transport in finite-size micro- and nano-scale devices. This study focuses on the development of a numerical framework tailored for addressing the phonon BTE within irregular geometries. Specifically, a two-dimensional implicit nodal discontinuous Galerkin finite element method (DGFEM) is developed for solving the phonon BTE with Callaway’s dual relaxation approximation. Through this methodology, the size and wave effects of thermal transport in graphene ribbons with varying geometries are investigated. Numerical simulations conducted using the proposed DGFEM exhibit commendable concordance with extant literature, affirming the method's efficacy and precision in modeling phonon transport within finite-size microstructures. Furthermore, the application of DGFEM facilitates an exploration of thermal transport in kinked graphene ribbons. Notably, in exceedingly narrow graphene ribbons, the introduction of kinks results in a significant reduction of thermal conductance by up to 14.8 %. Moreover, the presence of kinks elicits a discernible monotonic escalation of thermal conductance with temperature. These findings furnish tangible directives for manipulating thermal transport in microstructures via kink modulation.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"172 ","pages":"Article 116295"},"PeriodicalIF":2.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144089761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0