Physica E-low-dimensional Systems & Nanostructures最新文献_第3页

First-principles exploration of hydrogen evolution ability in MoS2/hBNC/MoSSe vdW trilayer heterojunction for water splitting

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-02-24 DOI: 10.1016/j.physe.2025.116221

Lei Tian , Jiahuan Hu , Chengyu He , Zhenyi Jiang

引用次数: 0

Regulation of electronic structures in ReSeS monolayer with anisotropic deformations

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-02-22 DOI: 10.1016/j.physe.2025.116210

Timsy Tinche Lin , Haochen Deng , Junwei Ma , Lizhe Liu

{"title":"Regulation of electronic structures in ReSeS monolayer with anisotropic deformations","authors":"Timsy Tinche Lin , Haochen Deng , Junwei Ma , Lizhe Liu","doi":"10.1016/j.physe.2025.116210","DOIUrl":"10.1016/j.physe.2025.116210","url":null,"abstract":"<div><div>Because of their unique and rich physical properties, transition metal dichalcogenides (TMDs) materials have attracted much interest. Many studies suggest that introducing the degree of freedom of anisotropy—which may be brought about by low structural symmetry—might further optimize their applications in industry and manufacturing. However, most currently reported TMDs do not achieve the theoretical minimum symmetry. Utilizing the first principles calculation, we present ReSeS monolayer with a Janus structure. Results indicate that its electronic dispersion is sensitive to structural distortions, which increases metallicity. Our reduction-Hamiltonian can provide a qualitative description, but further analyses reveal that bonding/antibonding properties near the Fermi surface are the more fundamental cause of the variations. Furthermore, geometric deformations can regulate the effective mass of electrons as well as the spectroscopic response, resulting in anisotropic behaviours. Our ideas serve as a foundation for developing new regulable optoelectronic devices.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"170 ","pages":"Article 116210"},"PeriodicalIF":2.9,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474371","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

Friedel oscillations in two-dimensional materials with inverted bands and Mexican-hat dispersion

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-02-22 DOI: 10.1016/j.physe.2025.116213

Vladimir A. Sablikov

引用次数: 0

High-sensitivity graphene-gold metasurface optical biosensor for early melanoma detection optimized with machine learning using a one-dimensional convolutional neural network and binary encoding

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-02-21 DOI: 10.1016/j.physe.2025.116214

Jacob Wekalao , Ahmed Mehaney , Nassir Saad Alarifi , Mostafa R. Abukhadra , Hussein A. Elsayed

{"title":"High-sensitivity graphene-gold metasurface optical biosensor for early melanoma detection optimized with machine learning using a one-dimensional convolutional neural network and binary encoding","authors":"Jacob Wekalao , Ahmed Mehaney , Nassir Saad Alarifi , Mostafa R. Abukhadra , Hussein A. Elsayed","doi":"10.1016/j.physe.2025.116214","DOIUrl":"10.1016/j.physe.2025.116214","url":null,"abstract":"<div><div>This research presents an advanced terahertz metasurface sensor incorporating graphene and gold elements in a W-shaped resonator configuration for non-invasive melanoma detection. The sensor design, optimized through COMSOL Multiphysics simulations, operates by detecting minute variations in the refractive index of skin tissue that occur during early melanoma development. The optimized sensor achieves a sensitivity of 450 GHzRIU<sup>−1</sup> with a narrow spectral linewidth of 35 GHz in the terahertz regime. A one-dimensional convolutional neural network (1D-CNN) algorithm enhances the sensor's predictive capabilities, achieving R<sup>2</sup> values exceeding 0.95 across various operational parameters. The sensor demonstrates dual functionality through binary information encoding capability via chemical potential modulation. The proposed design shows significant advantages over conventional diagnostic methods, offering rapid, non-invasive detection with high accuracy. Moreover, our numerical findings reveals that the designed sensor provides some robustness performance against various geometric parameters and incident angles, which in turns make it promising for practical melanoma diagnosis applications.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"170 ","pages":"Article 116214"},"PeriodicalIF":2.9,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465352","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

Comparative study on the electronic and magnetic properties of two-dimensional Janus materials: h-SVSiN2 and t-SVSiN2

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-02-16 DOI: 10.1016/j.physe.2025.116212

Ruixue Li , Sicong Zhu , Jun Ding

{"title":"Comparative study on the electronic and magnetic properties of two-dimensional Janus materials: h-SVSiN2 and t-SVSiN2","authors":"Ruixue Li , Sicong Zhu , Jun Ding","doi":"10.1016/j.physe.2025.116212","DOIUrl":"10.1016/j.physe.2025.116212","url":null,"abstract":"<div><div>Search for two-dimensional magnetic semiconductors and half-metals are particularly significant for spintronic applications. By substituting N-Si-N atom group with S atoms on one side of SVSiN<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> monolayer, two Janus monolayers: <span><math><mi>h</mi></math></span>-SVSiN<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> and <span><math><mi>t</mi></math></span>-SVSiN<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> were proposed. Through density functional theory, their electronic and magnetic properties have been studied systematically. Our results show that Janus <span><math><mi>h</mi></math></span>-SVSiN<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> monolayer is an indirect semiconductor with intrinsic ferromagnetic order, while Janus <span><math><mi>t</mi></math></span>-SVSiN<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> monolayer exhibits half-metallic feature. They both possess easy-plane magnetic anisotropy, with Curie temperature of 290 and 136 K for <span><math><mi>h</mi></math></span>-SVSiN<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> and <span><math><mi>t</mi></math></span>-SVSiN<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> monolayers, respectively. The electronic structures can be regulated by biaxial strain, such as semiconductor to half-metal transition. A spintronic device based on <span><math><mi>t</mi></math></span>-SVSiN<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> monolayer has been designed, showing high magnetoresistance ratio and excellent spin filtering effect. These findings imply that Janus SVSiN<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> monolayers are promising for 2D magnetism and spintronics.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"169 ","pages":"Article 116212"},"PeriodicalIF":2.9,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427826","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

Capturing magic angles in twisted bilayer graphene from information theory markers

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-02-12 DOI: 10.1016/j.physe.2025.116199

Manuel Calixto , Alberto Mayorgas , Octavio Castaños

引用次数: 0

Enhanced tunneling probabilities through a barrier with embedded δ−potential wells

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-02-11 DOI: 10.1016/j.physe.2025.116200

Jamie D. Walls, Karna Nagalla

{"title":"Enhanced tunneling probabilities through a barrier with embedded δ−potential wells","authors":"Jamie D. Walls, Karna Nagalla","doi":"10.1016/j.physe.2025.116200","DOIUrl":"10.1016/j.physe.2025.116200","url":null,"abstract":"<div><div>A theory for the tunneling of electrons through a one dimensional barrier of length <span><math><msub><mrow><mi>L</mi></mrow><mrow><mi>B</mi></mrow></msub></math></span> embedded with <span><math><mrow><mi>δ</mi><mo>−</mo></mrow></math></span>wells is presented. For a periodic arrangement of <span><math><msub><mrow><mi>N</mi></mrow><mrow><mi>S</mi></mrow></msub></math></span> <span><math><mrow><mi>δ</mi><mo>−</mo></mrow></math></span>wells, 100% transmission through a barrier can occur via transmission modes with effective wavelengths <span><math><mrow><msub><mrow><mi>λ</mi></mrow><mrow><mi>l</mi></mrow></msub><mo>≈</mo><mfrac><mrow><mn>2</mn><msub><mrow><mi>L</mi></mrow><mrow><mi>B</mi></mrow></msub></mrow><mrow><mi>l</mi></mrow></mfrac></mrow></math></span> for <span><math><mrow><mi>l</mi><mo>=</mo><mn>1</mn></mrow></math></span> to <span><math><mrow><mi>l</mi><mo>=</mo><msub><mrow><mi>N</mi></mrow><mrow><mi>S</mi></mrow></msub><mo>−</mo><mn>1</mn></mrow></math></span>. An additional broad transmission band is also shown to occur for <span><math><mrow><mi>δ</mi><mo>−</mo></mrow></math></span>well coupling strengths that cause the overall, spatially averaged potential to vanish. Even for random arrangements of <span><math><mrow><mi>δ</mi><mo>−</mo></mrow></math></span>wells within a barrier, nearly perfect transmission is predicted for the lowest transmission bands (i.e., largest <span><math><msub><mrow><mi>λ</mi></mrow><mrow><mi>l</mi></mrow></msub></math></span>). Numerical calculations also demonstrate that <span><math><mrow><mi>δ</mi><mo>−</mo></mrow></math></span>wells within a 1D barrier increase conductance over a wider range of barrier heights relative to the conductance through a 1D barrier without <span><math><mrow><mi>δ</mi><mo>−</mo></mrow></math></span>wells.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"169 ","pages":"Article 116200"},"PeriodicalIF":2.9,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418911","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

Quantum Fisher information for a nanowire system with Rashba interaction under intrinsic damping

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-02-11 DOI: 10.1016/j.physe.2025.116197

Rabie I. Mohamed , Manal G. Eldin

引用次数: 0

The electronic and piezoelectric properties of Janus monolayer MSi2X2Y2: A first-principles study

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-02-10 DOI: 10.1016/j.physe.2025.116211

Le Li, Depeng Zhang, Dongyan Liu, Hui Zhang

引用次数: 0

Second harmonic generation and electronic properties in the septuple-atomic-layer MA2Z4 family

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-02-07 DOI: 10.1016/j.physe.2025.116202

Yanyan Qian , Yadong Wei , Weiqi Li , Weiquan Tian , Jianqun Yang , XingJi Li , Jinluo Cheng

{"title":"Second harmonic generation and electronic properties in the septuple-atomic-layer MA2Z4 family","authors":"Yanyan Qian , Yadong Wei , Weiqi Li , Weiquan Tian , Jianqun Yang , XingJi Li , Jinluo Cheng","doi":"10.1016/j.physe.2025.116202","DOIUrl":"10.1016/j.physe.2025.116202","url":null,"abstract":"<div><div>Two-dimensional (2D) Janus monolayers represent a novel class of materials characterized by their unique structures and exceptional properties. The excitonic characteristics, along with the linear and nonlinear optical responses of the 2D MA<sub>2</sub>Z<sub>4</sub> family, have been systematically investigated through first-principles calculations. The findings indicate that monolayers of MSiGeN<sub>4</sub> (M = Mo or W) exhibit a pronounced second harmonic generation (SHG) response and notable infrared transmission capabilities, due to the breaking of mirror symmetry in these materials. A comparative analysis of the SHG response of intrinsic MSi<sub>2</sub>N<sub>4</sub> (M = Mo and W) monolayers demonstrates that Janus MSiGeN<sub>4</sub> (M = Mo and W) monolayers significantly enhance the SHG response, with enhancement factors of 5.5 and 3.8 at infrared wavelengths (1064 nm). The Janus monolayers also exhibit an additional out-of-plane response, thus enhancing the efficiency of incident light utilization from all directions. Specifically, the out-of-plane response of Janus WSiGeN<sub>4</sub> monolayers is 1.1 pm/V greater than the in-plane response of intrinsic WSi<sub>2</sub>N<sub>4</sub>. Furthermore, the dependence of SHG polarizability indicates that the out-of-plane polarizability significantly modifies the SHG response as a function of the incident angle <em>θ</em>. As a derivative of the 2D MA<sub>2</sub>Z<sub>4</sub> family, MSiGeN<sub>4</sub> (M = Mo and W) expands the scope of 2D Janus materials, and these findings may inform the design and synthesis of innovative 2D nonlinear optical materials.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"169 ","pages":"Article 116202"},"PeriodicalIF":2.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427824","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