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

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Adsorption of toxic gases chlorine, phosgene, and mustard on tetrahexcarbon: DFT and semi-empirical MD studies 有毒气体氯、光气和芥菜在四己碳上的吸附:DFT和半经验MD研究
IF 2.9 3区 物理与天体物理
Physica E-low-dimensional Systems & Nanostructures Pub Date : 2026-01-01 Epub Date: 2025-09-20 DOI: 10.1016/j.physe.2025.116376
Morteza Torabi Rad, Ramin Karimian
{"title":"Adsorption of toxic gases chlorine, phosgene, and mustard on tetrahexcarbon: DFT and semi-empirical MD studies","authors":"Morteza Torabi Rad,&nbsp;Ramin Karimian","doi":"10.1016/j.physe.2025.116376","DOIUrl":"10.1016/j.physe.2025.116376","url":null,"abstract":"<div><div>This study demonstrates that tetrahexcarbon (THC) serves as an effective substrate for detecting toxic gases chlorine, phosgene, and mustard through non-covalent interactions. Density functional theory (DFT) calculations reveal excellent agreement with reference structures and size-dependent morphology (planar C<sub>60</sub>H<sub>28</sub> vs. saddle-shaped C<sub>98</sub>H<sub>36</sub>). The THC substrate maintains a 3.83<!--> <!-->eV band gap with <span><math><mo>&lt;</mo></math></span>12<!--> <!-->% reduction upon adsorption, while DOS, NBO, and ELF analyses confirm physisorption with minimal electronic perturbation. Adsorption energies follow reasonable pattern: mustard (-24.75<!--> <!-->kcal<!--> <!-->mol<sup>-1</sup>) <span><math><mo>&gt;</mo></math></span> phosgene (-13.18<!--> <!-->kcal<!--> <!-->mol<sup>-1</sup>) <span><math><mo>&gt;</mo></math></span> chlorine (-10.56<!--> <!-->kcal<!--> <!-->mol<sup>-1</sup>), supported by QTAIM showing 2-11 bond critical points with positive <span><math><mrow><msup><mrow><mo>∇</mo></mrow><mrow><mn>2</mn></mrow></msup><mi>ρ</mi></mrow></math></span>. Chlorine exhibits superior sensitivity (9.11 × 10<sup>18</sup> electrons/m<sup>3</sup>) and fast recovery (1.84<!--> <!-->ns), enabling reusable detection, while mustard’s slow recovery (46.1<!--> <!-->s) suggests single-use applications. Thermodynamics confirm spontaneous adsorption (<span><math><mrow><mi>Δ</mi><mi>G</mi><mo>&lt;</mo><mn>0</mn></mrow></math></span>) with entropy trends reflecting molecular complexity, consistent with water interactions. Semi-empirical molecular dynamics (MD) simulations confirm the DFT-optimized configuration as the global minimum, with all sampled states showing higher energies and no chemical reactions, further validating THC’s physisorption capability for these toxic gases. These results position THC as a versatile platform for both real-time monitoring and one-time detection of chemical threats. Future work will investigate doping techniques to further optimize the properties of THC for applications in sensing, adsorption, and catalysis.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"175 ","pages":"Article 116376"},"PeriodicalIF":2.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145159008","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
Exact treatment of rotation-induced modifications in two-dimensional quantum rings 二维量子环中旋转诱导修饰的精确处理
IF 2.9 3区 物理与天体物理
Physica E-low-dimensional Systems & Nanostructures Pub Date : 2026-01-01 Epub Date: 2025-11-08 DOI: 10.1016/j.physe.2025.116416
Carlos Magno O. Pereira, Frankbelson dos S. Azevedo, Edilberto O. Silva
{"title":"Exact treatment of rotation-induced modifications in two-dimensional quantum rings","authors":"Carlos Magno O. Pereira,&nbsp;Frankbelson dos S. Azevedo,&nbsp;Edilberto O. Silva","doi":"10.1016/j.physe.2025.116416","DOIUrl":"10.1016/j.physe.2025.116416","url":null,"abstract":"<div><div>We investigate the influence of rotation on the Fermi energy, magnetization, and persistent current in two-dimensional quantum rings. Using the Tan-Inkson confinement potential and incorporating rotational effects through a non-inertial coupling, we derive analytical expressions for the energy levels and examine the modifications induced by rotation. We then numerically explore how variations in angular velocity affect the Fermi energy, magnetization, and persistent current. Our results show that rotation has a significant impact on these physical properties, underscoring the importance of considering rotational effects in quantum ring systems. This suggests that rotation could serve as a control parameter in the development of new mesoscopic devices, without the need for additional fields or geometric modifications.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"176 ","pages":"Article 116416"},"PeriodicalIF":2.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145518054","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
Geometry-driven modulation of spin wave spectra in undulated YIG nanostrip 波动YIG纳米带中自旋波谱的几何驱动调制
IF 2.9 3区 物理与天体物理
Physica E-low-dimensional Systems & Nanostructures Pub Date : 2026-01-01 Epub Date: 2025-10-23 DOI: 10.1016/j.physe.2025.116398
G.P. Fuentes , L.A.P. Gonçalves , E. Padrón-Hernández , M. Cabrera-Baez
{"title":"Geometry-driven modulation of spin wave spectra in undulated YIG nanostrip","authors":"G.P. Fuentes ,&nbsp;L.A.P. Gonçalves ,&nbsp;E. Padrón-Hernández ,&nbsp;M. Cabrera-Baez","doi":"10.1016/j.physe.2025.116398","DOIUrl":"10.1016/j.physe.2025.116398","url":null,"abstract":"<div><div>We present a quantitative micromagnetic study on spin wave dynamics in sinusoidally undulated YIG nanostrip, demonstrating that surface geometry can induce magnonic branch-enlargement without compositional modulation. Our simulations reveal that for surface modes (<span><math><mrow><mover><mrow><mi>k</mi></mrow><mo>→</mo></mover><mo>⊥</mo><msub><mrow><mover><mrow><mi>H</mi></mrow><mo>→</mo></mover></mrow><mrow><mn>0</mn></mrow></msub></mrow></math></span>), increasing of ripple depth <span><math><mi>δ</mi></math></span> from 5 nm to 20 nm results in a band broadening <span><math><mrow><mi>Δ</mi><mi>f</mi></mrow></math></span> scaling linearly from 0.5 GHz to 2.0 GHz. For Volume modes (<span><math><mrow><mover><mrow><mi>k</mi></mrow><mo>→</mo></mover><mo>∥</mo><msub><mrow><mover><mrow><mi>H</mi></mrow><mo>→</mo></mover></mrow><mrow><mn>0</mn></mrow></msub></mrow></math></span>) forbidden band gaps appear from wave-vectors <span><math><mrow><mi>k</mi><mo>=</mo><mi>m</mi><mi>π</mi><mo>/</mo><msub><mrow><mi>λ</mi></mrow><mrow><mi>N</mi></mrow></msub><mo>≈</mo><mn>0</mn><mo>.</mo><mn>1</mn></mrow></math></span> (rad/nm). We propose an analytical scaling <span><math><mrow><mi>Δ</mi><mi>f</mi><mo>∝</mo><mi>δ</mi><msup><mrow><mo>sin</mo></mrow><mrow><mn>2</mn></mrow></msup><mrow><mo>(</mo><mi>π</mi><mi>k</mi><mo>/</mo><msub><mrow><mi>k</mi></mrow><mrow><mi>Bragg</mi></mrow></msub><mo>)</mo></mrow></mrow></math></span>, validated by the numerical data, establishing a predictive model for ripple-induced spectral modulation. The curvature-driven anisotropy and demagnetizing field variations explain the observed spectral diffusion. Our results provide a robust framework for geometrical control of spin wave propagation, offering a design pathway for planar, lithography-compatible magnonic devices with reconfigurable dispersion characteristics. At this level, annalistic calculations are not efficient.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"175 ","pages":"Article 116398"},"PeriodicalIF":2.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145363366","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
Robust global tripartite entanglement in a mixed spin-(1,1/2,1) Heisenberg trimer 混合自旋-(1,1/2,1)Heisenberg三聚体中的鲁棒全局三方纠缠
IF 2.9 3区 物理与天体物理
Physica E-low-dimensional Systems & Nanostructures Pub Date : 2026-01-01 Epub Date: 2025-10-21 DOI: 10.1016/j.physe.2025.116393
H. Vargová
{"title":"Robust global tripartite entanglement in a mixed spin-(1,1/2,1) Heisenberg trimer","authors":"H. Vargová","doi":"10.1016/j.physe.2025.116393","DOIUrl":"10.1016/j.physe.2025.116393","url":null,"abstract":"<div><div>We rigorously analyse global tripartite entanglement in a mixed-spin (<span><math><mn>1</mn></math></span>,<span><math><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></math></span>,<span><math><mn>1</mn></math></span>) Heisenberg trimer under varying exchange couplings, magnetic fields, and temperatures. Entanglement is quantified using the geometric mean of all three bipartite negativities, enabling us to map precisely the regions of spontaneous global entanglement and to classify the tripartite states according to the distribution of reduced bipartite correlations. We further investigate the thermal stability of entanglement across the full parameter space, with particular focus on the experimentally realised trimer [Ni(bapa)(H<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O)]<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>Cu(pba)(ClO<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span>)<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> (bapa = bis(3-aminopropyl)amine; pba = 1, 3-propylenebis(oxamato)), where global entanglement is predicted to persist up to <span><math><mrow><mo>∼</mo><mn>100</mn></mrow></math></span> K and magnetic fields approaching 210 T. Notably, we observe a thermally induced activation of robust entanglement in regions with a biseparable ground state, reaching values close to <span><math><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></math></span> - a phenomenon not previously reported. Finally, we propose a connection between the theoretically predicted tripartite entanglement and experimentally measurable quantities.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"175 ","pages":"Article 116393"},"PeriodicalIF":2.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145363433","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
Voltage fluctuations in a four-terminal quantum device with orthogonal, unitary or symplectic symmetry 正交对称、酉对称或辛对称的四端量子器件中的电压波动
IF 2.9 3区 物理与天体物理
Physica E-low-dimensional Systems & Nanostructures Pub Date : 2026-01-01 Epub Date: 2025-10-08 DOI: 10.1016/j.physe.2025.116386
F. Castañeda-Ramírez , M. Martínez-Mares , A.M. Martínez-Argüello
{"title":"Voltage fluctuations in a four-terminal quantum device with orthogonal, unitary or symplectic symmetry","authors":"F. Castañeda-Ramírez ,&nbsp;M. Martínez-Mares ,&nbsp;A.M. Martínez-Argüello","doi":"10.1016/j.physe.2025.116386","DOIUrl":"10.1016/j.physe.2025.116386","url":null,"abstract":"<div><div>The statistical fluctuations of the voltage across a quantum wire in a four-terminal arrangement, where two of the terminals are used as probes while the other two are used to establish a flux current, is studied in the single channel case. The quantum wire to be measured consists of a chaotic microcavity or a disordered conductor in the presence of one of the three symmetry classes: orthogonal, unitary, or symplectic. Using the circular ensembles of random matrix theory or the Dorokov–Mello–Pereyra–Kumar (DMPK) equation, the statistical distribution of the voltage is reduced to quadratures for noninvasive probes which is solved numerically. Numerical simulations from random matrix theory or for the DMPK equation are performed for any coupling strength of the probes. For the chaotic cavity the effect of the symmetry class is clearly manifested through the weak and weak anti-localization phenomena for the orthogonal and symplectic symmetry classes, respectively. A similar effect is found, but with respect to the degree of disorder in a quantum wire as it evolves from strong to weak disorder: a simple correspondence between the label of the symmetry class and the degree of disorder, is found.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"175 ","pages":"Article 116386"},"PeriodicalIF":2.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267671","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
Robust structural superlubricity of twisted graphene bilayer and domain walls between commensurate moiré pattern domains from first-principles calculations 基于第一性原理计算的扭曲石墨烯双分子层和相应涡流模式域之间的畴壁的鲁棒结构超润滑性
IF 2.9 3区 物理与天体物理
Physica E-low-dimensional Systems & Nanostructures Pub Date : 2026-01-01 Epub Date: 2025-10-24 DOI: 10.1016/j.physe.2025.116399
Irina V. Lebedeva , Andrey M. Popov , Yulia G. Polynskaya , Andrey A. Knizhnik , Sergey A. Vyrko , Nikolai A. Poklonski
{"title":"Robust structural superlubricity of twisted graphene bilayer and domain walls between commensurate moiré pattern domains from first-principles calculations","authors":"Irina V. Lebedeva ,&nbsp;Andrey M. Popov ,&nbsp;Yulia G. Polynskaya ,&nbsp;Andrey A. Knizhnik ,&nbsp;Sergey A. Vyrko ,&nbsp;Nikolai A. Poklonski","doi":"10.1016/j.physe.2025.116399","DOIUrl":"10.1016/j.physe.2025.116399","url":null,"abstract":"<div><div>Twisted graphene layers exhibit extremely low friction for relative sliding. Nevertheless, previous studies suggest that the area contribution to friction for commensurate moiré systems is finite and might restrict macroscopic superlubricity for large layer overlaps. In this paper, we investigate the potential energy surface (PES) for relative displacement of the layers forming moiré patterns (2,1) and (3,1) by accurate density functional theory calculations using the vdW-DF3 functional. The amplitudes of PES corrugations on the order of 0.4 and 0.03 <span><math><mrow><mi>μ</mi><mi>eV</mi></mrow></math></span> per atom of one layer, respectively, are obtained. The account of structural relaxation doubles this value for the (2,1) pattern, while causing only minimal changes for the (3,1) pattern. We show that different from aligned graphene layers, for moiré patterns, PES minima and maxima can switch their positions upon changing the interlayer distance. The PES shape is closely described by the first spatial Fourier harmonics both with and without account of structural relaxation. A barrier for relative rotation of the layers to an incommensurate state that can make superlubricity robust is estimated based on the approximated PES. We also derive a set of measurable physical properties related to interlayer interaction including shear mode frequency, shear modulus and static friction force. Furthermore, we predict that it should be possible to observe domain walls separating commensurate domains, each comprising a large number of moiré pattern unit cells, and provide estimates of their characteristics.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"175 ","pages":"Article 116399"},"PeriodicalIF":2.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145416878","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
Charge polarization-driven type-II band alignment and enhanced piezoelectricity in tin nitride halide heterostructures 氮化锡卤化异质结构中电荷极化驱动的ii型带对准和增强的压电性
IF 2.9 3区 物理与天体物理
Physica E-low-dimensional Systems & Nanostructures Pub Date : 2026-01-01 Epub Date: 2025-09-06 DOI: 10.1016/j.physe.2025.116358
Arneet Kaur , Pradip Nandi , Abir De Sarkar
{"title":"Charge polarization-driven type-II band alignment and enhanced piezoelectricity in tin nitride halide heterostructures","authors":"Arneet Kaur ,&nbsp;Pradip Nandi ,&nbsp;Abir De Sarkar","doi":"10.1016/j.physe.2025.116358","DOIUrl":"10.1016/j.physe.2025.116358","url":null,"abstract":"<div><div>In the quest for efficient energy conversion materials, we investigate piezoelectric properties of tin nitride halide (SnNX) through strategic design of vertical and lateral SnNCl/SnNBr heterostructures, using first-principles calculations. Two vertical configurations (HB-I and HB-II), based on the choice of the basal atomic layer (SnNBr or SnNCl), are studied with six stacking sequences featuring parallel and antiparallel orientations. The interlayer registry index highlights the dominant role of interface interactions in determining the energy landscape. HB-II configuration exhibits a type-II band alignment for all stacking orders (AA, AB, AC). While only the AC stacking order of HB-I displays a type-II band alignment, which correlates with the reversal in the direction of charge polarization. Lateral heterostructures composed of eight-unit cells of SnNCl and SnNBr [(SnNCl)<sub>8</sub>/(SnNBr)<sub>8</sub>] are also constructed along armchair and zigzag directions, revealing mixed band alignment at the interfaces. A comprehensive analysis indicates that interfacial charge polarization critically determines the piezoelectric response. The out-of-plane piezoelectric strain coefficient, <span><math><mrow><msub><mi>d</mi><mn>33</mn></msub></mrow></math></span> reaches 90 p.m./V in the vertical heterostructure, comparable to leading bulk perovskites. Our findings provide a deeper understanding of band alignment and piezoelectricity in SnNCl/SnNBr heterostructures, paving the way for future experimental efforts to design advanced 2D energy conversion materials with tailored properties.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"175 ","pages":"Article 116358"},"PeriodicalIF":2.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145061261","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
Electron-optical phonon scattering in quantum wells in a tilted quantizing magnetic field 倾斜量子化磁场中量子阱中的电子-光学声子散射
IF 2.9 3区 物理与天体物理
Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-10-01 Epub Date: 2025-08-09 DOI: 10.1016/j.physe.2025.116351
M.P. Telenkov, Yu.A. Mityagin, D.S. Korchagin
{"title":"Electron-optical phonon scattering in quantum wells in a tilted quantizing magnetic field","authors":"M.P. Telenkov,&nbsp;Yu.A. Mityagin,&nbsp;D.S. Korchagin","doi":"10.1016/j.physe.2025.116351","DOIUrl":"10.1016/j.physe.2025.116351","url":null,"abstract":"<div><div>Electron scattering with longitudinal polar optical phonons in a quantizing magnetic field tilted to the plane of quantum well layers is studied. The expressions are derived for the electron scattering rate due to longitudinal polar optical phonon emission in a tilted quantizing magnetic field. The effect of variations in both the magnitude and orientation of the magnetic field on the electron-phonon scattering processes is studied. The different relation between the inter-subband spacing and the optical phonon energy are considered – when the inter-subband spacing is greater than, equal to, and lower than the optical phonon energy. Principal transformation of the inter-subband scattering rate dependence on the quantizing component of the magnetic field – from oscillatory to monotonic – was found to occur when inter-subband spacing comes closer to optical phonon frequency.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"174 ","pages":"Article 116351"},"PeriodicalIF":2.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144878252","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
Effect of electric field on excitons in wide quantum wells 电场对宽量子阱中激子的影响
IF 2.9 3区 物理与天体物理
Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-10-01 Epub Date: 2025-07-30 DOI: 10.1016/j.physe.2025.116333
Shiming Zheng, E.S. Khramtsov, I.V. Ignatiev
{"title":"Effect of electric field on excitons in wide quantum wells","authors":"Shiming Zheng,&nbsp;E.S. Khramtsov,&nbsp;I.V. Ignatiev","doi":"10.1016/j.physe.2025.116333","DOIUrl":"10.1016/j.physe.2025.116333","url":null,"abstract":"<div><div>A microscopic model of a heterostructure with a quantum well (QW) is proposed to study exciton properties in an external electric field. The effect of an electric field ranging from 0 to 6 kV/cm applied to a GaAs/AlGaAs QW structure in the growth direction is studied for several QWs of various widths up to 100 nm. The three-dimensional Schrödinger equation (SE) for the exciton is numerically solved using the finite difference method. Wave functions and energies of several states of the heavy-hole and light-hole excitons are calculated. The dependencies of exciton state energy, binding energy, radiative broadening, and static dipole moment on the applied electric field are determined. Additionally, the threshold for exciton dissociation in the 100-nm QW is established. Furthermore, we calculate an electric-field-induced shift in the center of mass of heavy-hole and light-hole excitons in the QWs. Finally, we simulate the reflection spectra of heterostructures with GaAs/AlGaAs QWs under an electric field using the calculated energies, radiative broadenings, and phases of exciton resonances.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"174 ","pages":"Article 116333"},"PeriodicalIF":2.9,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144781827","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
Structural and optical characterization of electron Beam–Deposited Dy2O3 thin films on n-GaAs(111) substrate for photonic applications 光子应用中n-GaAs(111)衬底上电子束沉积Dy2O3薄膜的结构和光学特性
IF 2.9 3区 物理与天体物理
Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-10-01 Epub Date: 2025-08-09 DOI: 10.1016/j.physe.2025.116350
Hayet Saghrouni , Lotfi Beji
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