Physica E-low-dimensional Systems & Nanostructures最新文献_第6页

Quantum transport simulations of α-In2Se3 antiferroelectric tunnel junctions α-In2Se3 反铁电隧道结的量子输运模拟

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2024-08-28 DOI: 10.1016/j.physe.2024.116093

Lingxue Zhang , Jiaxin Zhang , Yuxuan Sun , Wei Li , Ruge Quhe

引用次数: 0

Multiferroicity in a two-dimensional vanadium dioxide 二维二氧化钒的多铁性

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2024-08-27 DOI: 10.1016/j.physe.2024.116090

Gang Xiao, Wen-Zhi Xiao

{"title":"Multiferroicity in a two-dimensional vanadium dioxide","authors":"Gang Xiao, Wen-Zhi Xiao","doi":"10.1016/j.physe.2024.116090","DOIUrl":"10.1016/j.physe.2024.116090","url":null,"abstract":"<div>Two-dimensional (2D) multiferroic materials have attracted great interest owing to the integration of ferroelastic and ferromagnetic properties. We identify a novel 2D multiferroic vanadium dioxide (VO₂) monolayer exhibiting a monoclinic phase with a C2/m space group using density functional theory (DFT) calculations. The energetic, dynamic, thermodynamic and mechanical analyses indicate that the monolayer exhibits excellent stability and can be prepared experimentally. The arrangement of the electronic energy bands is analogous to that of a type I heterostructure. The electron doping at a concentration of 0.2 electrons per V atom results in a significant increase in the Curie temperature (TC) from 11.2 to 184 K estimated by Monte Carlo simulations, and a transition from semiconductor to half-metallicity. In addition, the VO₂ monolayer exhibits 120° ferroelastic switching with a moderate switching energy barrier of 32 meV per atom, subsequently allowing 120° rotation of the easy magnetisation axis. Our work reveals the intrinsic multiferroicity of VO₂, which may provide a guidance on the design of next-generation mechanical/spintronic devices.</div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"165 ","pages":"Article 116090"},"PeriodicalIF":2.9,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142088283","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

Porous Metal Organic Framework (MOF) derived dimorphic (n-ZnO/p-NiO) Z-scheme heterojunction anchored with MWCNTs (ternary nano-architecture): A novel approach for optimization of photodegradation mechanism and kinetics of Congo red (CR) dye 多孔金属有机框架（MOF）衍生的二态（n-ZnO/p-NiO）Z型异质结与 MWCNTs（三元纳米结构）的锚定：优化刚果红（CR）染料光降解机理和动力学的新方法

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2024-08-26 DOI: 10.1016/j.physe.2024.116076

P. Abisha, Jinitha C.G, S. Sonia

{"title":"Porous Metal Organic Framework (MOF) derived dimorphic (n-ZnO/p-NiO) Z-scheme heterojunction anchored with MWCNTs (ternary nano-architecture): A novel approach for optimization of photodegradation mechanism and kinetics of Congo red (CR) dye","authors":"P. Abisha, Jinitha C.G, S. Sonia","doi":"10.1016/j.physe.2024.116076","DOIUrl":"10.1016/j.physe.2024.116076","url":null,"abstract":"<div>Global efforts to combat water pollution, especially from organic dyes like Congo red, emphasize the use of advanced nanomaterials for sewage purification. Metal-Organic Frameworks (MOFs), known for their crystalline structures and versatile properties, have become pivotal in wastewater treatment research. Integrating MWCNTs into MOF derived composite nanostructures is a strategic advancement, boosting the efficiency of photocatalytic systems and addressing environmental concerns. This study details the synthesis of a novel Z-scheme heterojunction nanocomposite (n-ZnO/p-NiO) incorporating multi-walled carbon nanotubes (MWCNTs), achieved via a solvothermal method using metal-organic framework (MOF) as a template. The study uses XRD, FTIR, FESEM, BET, UV, and PL for comprehensive nanocomposite characterization, offering insights into its structural, morphological, and optical properties. The resultant nanocomposite displays high surface area, sturdy pore arrangement, and consistent morphology. MWCNTs influence crystal growth and optical absorption, enhancing surface hydroxyl group concentration and acting as electron acceptors. This results in decreased photo oxidation and improved overall stability under light exposure in the composite. The composite achieves 92 % Congo red degradation in 60 min under UV light, showcasing superior dye adsorption capacity. This underscores its potential as an efficient photocatalyst for environmental remediation and wastewater treatment.</div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"165 ","pages":"Article 116076"},"PeriodicalIF":2.9,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142149143","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 hydrogen on graphene growth on SiC(0001) under atmospheric pressure 常压下氢气对石墨烯在碳化硅（0001）上生长的影响

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2024-08-22 DOI: 10.1016/j.physe.2024.116088

Lingxiu Chen, Dehe Wang, Qingxu Sun, Junyuan Wu, Hongyu Sun, Yang Zhang, Liwei Shi

引用次数: 0

Effect of a perpendicular magnetic field on bilayer graphene under dual gating 双选通条件下垂直磁场对双层石墨烯的影响

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2024-08-19 DOI: 10.1016/j.physe.2024.116077

Mouhamadou Hassane Saley , Abderrahim El Mouhafid , Ahmed Jellal

{"title":"Effect of a perpendicular magnetic field on bilayer graphene under dual gating","authors":"Mouhamadou Hassane Saley , Abderrahim El Mouhafid , Ahmed Jellal","doi":"10.1016/j.physe.2024.116077","DOIUrl":"10.1016/j.physe.2024.116077","url":null,"abstract":"<div>By studying the impact of a perpendicular magnetic field <math><mi>B</mi></math> on AB-bilayer graphene (AB-BLG) under dual gating, we yield several key findings for the ballistic transport of gate <math><msub><mrow><mi>U</mi></mrow><mrow><mi>∞</mi></mrow></msub></math>. Firstly, we discover that the presence of <math><mi>B</mi></math> leads to a decrease in transmission. At a high value of <math><mi>B</mi></math>, we notice the occurrence of anti-Klein tunneling over a significant area. Secondly, in contrast to the results reported in the literature, where high peaks were found with an increasing in-plane pseudomagnetic field applied to AB-BLG, we find a decrease in conductivity as <math><mi>B</mi></math> increases. However, it is worth noting that in both cases, the number of oscillations decreases compared to the result in the study where no magnetic field was present <math><mrow><mo>(</mo><mi>B</mi><mo>=</mo><mn>0</mn><mo>)</mo></mrow></math>. Thirdly, at the neutrality point, we demonstrate that the conductivity decreases and eventually reaches zero for a high value of <math><mi>B</mi></math>, which contrasts with the result that the conductivity remains unchanged regardless of the value taken by the in-plane field. Finally, we consider the diffusive transport with gate <math><mrow><msub><mrow><mi>U</mi></mrow><mrow><mi>∞</mi></mrow></msub><mo>=</mo><mn>0</mn><mo>.</mo><mn>2</mn><msub><mrow><mi>γ</mi></mrow><mrow><mn>1</mn></mrow></msub></mrow></math> and observe two scenarios. The amplitude of conductivity oscillations increases with <math><mi>B</mi></math> for energy <math><mi>E</mi></math> less than <math><msub><mrow><mi>U</mi></mrow><mrow><mi>∞</mi></mrow></msub></math> but decreases in the opposite case <math><mrow><mi>E</mi><mo>></mo><msub><mrow><mi>U</mi></mrow><mrow><mi>∞</mi></mrow></msub></mrow></math>.</div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"165 ","pages":"Article 116077"},"PeriodicalIF":2.9,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142044774","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 discord in zigzag graphene nanoribbons 之字形石墨烯纳米带中的量子不和谐现象

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2024-08-18 DOI: 10.1016/j.physe.2024.116075

Xiao-Dong Tan , Ya Feng Song , Yu Shi , Ru Hou

引用次数: 0

Study on the modulation of luminescence peak position and luminescence mechanism of black phosphorus 黑磷发光峰位置调制及发光机理研究

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2024-08-16 DOI: 10.1016/j.physe.2024.116078

J.R. Chen, M.J. Peng, C. Chen, Y. Zhang, D.S. Ren

{"title":"Study on the modulation of luminescence peak position and luminescence mechanism of black phosphorus","authors":"J.R. Chen, M.J. Peng, C. Chen, Y. Zhang, D.S. Ren","doi":"10.1016/j.physe.2024.116078","DOIUrl":"10.1016/j.physe.2024.116078","url":null,"abstract":"<div>The application of black phosphorus in optoelectronic devices is hindered because of its inherent band gap characteristics. In the paper, black phosphorus was prepared by high-energy ball milling, and its related structure and properties were characterized. At the same time, the luminescence mechanism of black phosphorus was explored, and the effect of ultrasonic time on the structure and optical properties of black phosphorus was studied. The luminescence peak of black phosphorus can be modulated to the visible light range after adding polyethylene glycol, and the luminescence of black phosphorus is closely related to the P (020) and P (021). It was found that the luminescence intensity of alcoholized black phosphorus decreases with the increase of ultrasonic time. When the ultrasonic time is 15min, the luminescence intensity of alcoholized black phosphorus decreases greatly, this is because that the content of P (020) in black phosphorus decreases with the increase of ultrasonic time, resulting in the decrease of luminescence intensity.</div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"165 ","pages":"Article 116078"},"PeriodicalIF":2.9,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141997513","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

Piezoelectricity of Janus group-III monochalcogenide monolayers, multilayers and their vdW heterostructures: Insight from first-principles calculations 獐牙菜Ⅲ族单钙镓单层、多层及其 vdW 异质结构的压电性：第一原理计算的启示

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2024-08-15 DOI: 10.1016/j.physe.2024.116072

Kai Cheng , Jinke Xu , Peng Wu , Xu Guo , Sandong Guo , Yan Su

{"title":"Piezoelectricity of Janus group-III monochalcogenide monolayers, multilayers and their vdW heterostructures: Insight from first-principles calculations","authors":"Kai Cheng , Jinke Xu , Peng Wu , Xu Guo , Sandong Guo , Yan Su","doi":"10.1016/j.physe.2024.116072","DOIUrl":"10.1016/j.physe.2024.116072","url":null,"abstract":"<div>Using first-principles calculations, we have explored the piezoelectric properties of Janus multilayers and vdW heterostructures based on Janus group-III monochalcogenides. Our calculation results show that all the in-plane and out-of-plane piezoelectricity exists in Janus group-III monochalcogenide multilayers with the atomic radii difference and within intra-layer dipole moments affecting the e33/d33 value. For the vdW heterostructures, the e33 depends on the stacking configuration and increases with the decreasing interlayer distance. Furthermore, the piezoelectric effect properties of the vdW heterostructures are independent of the biaxial strain. Our understanding of how the layer number and vdW integration affect the piezoelectric effect in 2D materials provides theoretical guidance for the experimental application of 2D Janus monolayer and their vdW heterostructures and will also contribute to the development of robust electrical-mechanical-coupled systems with large power densities and energy harvesting capabilities.</div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"165 ","pages":"Article 116072"},"PeriodicalIF":2.9,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142007011","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

Force-field modeling of single-chirality-angle multi-walled WS2 nanotubes 单手性角度多壁 WS2 纳米管的力场建模

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2024-08-15 DOI: 10.1016/j.physe.2024.116066

Sergey I. Lukyanov, Andrei V. Bandura, Dmitry D. Kuruch, Robert A. Evarestov

引用次数: 0

Optimization of electron transmission on a 1D lattice 优化一维晶格上的电子传输

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2024-08-14 DOI: 10.1016/j.physe.2024.116067

Walter Unglaub , A.F.J. Levi

引用次数: 0