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

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<math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math> monolayer, two Janus monolayers: <math><mi>h</mi></math>-SVSiN<math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math> and <math><mi>t</mi></math>-SVSiN<math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math> were proposed. Through density functional theory, their electronic and magnetic properties have been studied systematically. Our results show that Janus <math><mi>h</mi></math>-SVSiN<math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math> monolayer is an indirect semiconductor with intrinsic ferromagnetic order, while Janus <math><mi>t</mi></math>-SVSiN<math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math> monolayer exhibits half-metallic feature. They both possess easy-plane magnetic anisotropy, with Curie temperature of 290 and 136 K for <math><mi>h</mi></math>-SVSiN<math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math> and <math><mi>t</mi></math>-SVSiN<math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math> monolayers, respectively. The electronic structures can be regulated by biaxial strain, such as semiconductor to half-metal transition. A spintronic device based on <math><mi>t</mi></math>-SVSiN<math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math> monolayer has been designed, showing high magnetoresistance ratio and excellent spin filtering effect. These findings imply that Janus SVSiN<math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math> 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 <math><msub><mrow><mi>L</mi></mrow><mrow><mi>B</mi></mrow></msub></math> embedded with <math><mrow><mi>δ</mi><mo>−</mo></mrow></math>wells is presented. For a periodic arrangement of <math><msub><mrow><mi>N</mi></mrow><mrow><mi>S</mi></mrow></msub></math> <math><mrow><mi>δ</mi><mo>−</mo></mrow></math>wells, 100% transmission through a barrier can occur via transmission modes with effective wavelengths <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> for <math><mrow><mi>l</mi><mo>=</mo><mn>1</mn></mrow></math> to <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>. An additional broad transmission band is also shown to occur for <math><mrow><mi>δ</mi><mo>−</mo></mrow></math>well coupling strengths that cause the overall, spatially averaged potential to vanish. Even for random arrangements of <math><mrow><mi>δ</mi><mo>−</mo></mrow></math>wells within a barrier, nearly perfect transmission is predicted for the lowest transmission bands (i.e., largest <math><msub><mrow><mi>λ</mi></mrow><mrow><mi>l</mi></mrow></msub></math>). Numerical calculations also demonstrate that <math><mrow><mi>δ</mi><mo>−</mo></mrow></math>wells within a 1D barrier increase conductance over a wider range of barrier heights relative to the conductance through a 1D barrier without <math><mrow><mi>δ</mi><mo>−</mo></mrow></math>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 MA2Z4 family, have been systematically investigated through first-principles calculations. The findings indicate that monolayers of MSiGeN4 (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 MSi2N4 (M = Mo and W) monolayers demonstrates that Janus MSiGeN4 (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 WSiGeN4 monolayers is 1.1 pm/V greater than the in-plane response of intrinsic WSi2N4. 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 θ. As a derivative of the 2D MA2Z4 family, MSiGeN4 (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

Transport evidence for the quantum Wigner solid formation in two-dimensional electron systems

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-02-04 DOI: 10.1016/j.physe.2025.116192

A.A. Shashkin , M. Yu. Melnikov , S.V. Kravchenko

引用次数: 0

GeO2 – ZnO nanocomposite rosettes for enhancement of performance in energy technologies: Coupling organic templated synthesis with microwave treatment

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-02-04 DOI: 10.1016/j.physe.2025.116198

Shaan Bibi Jaffri , Khuram Shahzad Ahmad , Isaac Abrahams , Wahidah H. Al-Qahtani

{"title":"GeO2 – ZnO nanocomposite rosettes for enhancement of performance in energy technologies: Coupling organic templated synthesis with microwave treatment","authors":"Shaan Bibi Jaffri , Khuram Shahzad Ahmad , Isaac Abrahams , Wahidah H. Al-Qahtani","doi":"10.1016/j.physe.2025.116198","DOIUrl":"10.1016/j.physe.2025.116198","url":null,"abstract":"<div><div>Current study introduces first report on the sustainable synthesis of GeO2 – ZnO nano-hetero-system copulated with the microwave treatment. GeO2 – ZnO has been effectively tuned for the band gap causing an alleviation from 4.89 to 2.89 eV upon the nanocomposite formation. With the hexagonal phase, GeO2 – ZnO possessed an average crystallite size of the 62.11 nm. These particles existed as nano-rossettes with the uniform upward projection. The catalytic performance of the synthesized material was more inclined towards pure hydrogen generation with the lower overpotential (ηHER) and Tafel slopes i.e. 128 mV and 121.9 mV dec−1. GeO2 – ZnO nano-rossettes bedecked electrode remained unscathed for a prolonged duration of the 1500 min and demonstrated commendable charge storage with the unit capacity of 384 mAH g−1. As a passivation layer in perovskite solar cells, these nanomaterials improved efficiency up to 15 % by prevention of the charge aggregation.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"169 ","pages":"Article 116198"},"PeriodicalIF":2.9,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143351158","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

Comparison of various schemes to determine the Young’s modulus of disordered carbon nanomembranes compared to crystalline graphene

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-02-01 DOI: 10.1016/j.physe.2024.116170

Levin Mihlan, Julian Ehrens, Jürgen Schnack

引用次数: 0

Edge effect induce spin-gapless semiconducting and half-metallic properties of N-doped zigzag graphene nanoribbons

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-02-01 DOI: 10.1016/j.physe.2024.116172

Jiewen Min, Xingyuan Ou, Xiong Liu, Wenting Zou, Zhaoting Li, Liqin Deng, Yuanxiang Deng

{"title":"Edge effect induce spin-gapless semiconducting and half-metallic properties of N-doped zigzag graphene nanoribbons","authors":"Jiewen Min, Xingyuan Ou, Xiong Liu, Wenting Zou, Zhaoting Li, Liqin Deng, Yuanxiang Deng","doi":"10.1016/j.physe.2024.116172","DOIUrl":"10.1016/j.physe.2024.116172","url":null,"abstract":"<div><div>Graphene nanoribbons with mixed edge structures are promising candidate materials for the next generation of nanoelectronics due to their unique and peculiar physical and chemical properties, as well as their interesting and tunable electronic structures. Here, we designs and calculates a series of periodic edge N-doped ZGNRs using first principles calculations based on density functional theory. The band gap of these ZGNRs can be adjusted from metal to semiconductor, by the periodic length of the nanobands, and the number and interval distance of N atom doping. Among them, 6-ZGNR-(1,3) is a metallic, 6-ZGNR-(1,4) and 6-ZGNR-(2,4) are half-metallic, 6-ZGNR-(2,5) and 6-ZGNR-(3,5) are SGS, and 6-ZGNR-(3,6) is a magnetic semiconductor. We projected band structures into px orbitals of edge C and N atoms separately, and found that the energy near the Fermi level in 6-ZGNR-(1,4) is mainly contributed by edge C atoms, while 6-ZGNR-(3,5) is contributed by edge N atoms. This indicates that N atom doping plays a major role in the transition of spin polarization properties. Our studies suggest that it will have significant theoretical significance and practical value in the application of spintronic devices.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"167 ","pages":"Article 116172"},"PeriodicalIF":2.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158215","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