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

Fano–Rashba effect in the presence of Majorana bound states 法诺-拉什巴效应在马约拉纳束缚州的存在

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-06-16 DOI: 10.1016/j.physe.2025.116306

B. Grez , J.P. Ramos-Andrade , P.A. Orellana

引用次数: 0

The influence of contact interfaces on transport statistics in field-effect transistors based on highly-doped InAs nanowires 高掺杂InAs纳米线场效应晶体管中接触界面对输运统计的影响

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-06-14 DOI: 10.1016/j.physe.2025.116309

A.A. Zhukov

引用次数: 0

Lateral electric field promotes the water transport in double-walled carbon nanotubes 横向电场促进双壁碳纳米管中水的输运

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-06-13 DOI: 10.1016/j.physe.2025.116314

Yiqiu Ru , Zi Wang , Tao Zhang , Keda Yang , Jiaye Su

{"title":"Lateral electric field promotes the water transport in double-walled carbon nanotubes","authors":"Yiqiu Ru , Zi Wang , Tao Zhang , Keda Yang , Jiaye Su","doi":"10.1016/j.physe.2025.116314","DOIUrl":"10.1016/j.physe.2025.116314","url":null,"abstract":"<div><div>A lateral electric field typically impedes the water transport in single-walled carbon nanotubes (SWCNTs), because it disrupts the hydrogen bond network among confined water molecules. In this work, through a series of molecular dynamics simulations, we observe an opposite phenomenon in double-walled carbon nanotubes (DWCNTs): the lateral electric field promotes the water transport. The underlying mechanism is that the hydrogen bond network can be partially breakdown by the lateral electric field, thereby melting the ice-like structures in DWCNTs, which facilitates water transport. Meanwhile, for the confined cylinder monolayer water, enhanced rotational motion under stronger field strengths can be more efficiently converted into translational motion. Specifically, as the field strength increases, the water flow increases almost linearly, corresponding to the decay in hydrogen bond number. With the increase in CNT length, the water flow exhibits a linear reduction and reaches completely zero at weak field strengths because of the formation of ice structures in long CNTs. Some other parameters, such as translocation time, occupancy number, and dipole and density distributions also show a specific dependence on the field strength and CNT length. These findings enrich our understanding of the unusual dynamics of water molecules in DWCNTs and shed light on a new idea for the design of novel nanofluidic devices.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"173 ","pages":"Article 116314"},"PeriodicalIF":2.9,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279264","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

A new decoupling strategy for strain and doping in wrinkled CVD graphene with total effective strain evaluation 褶皱CVD石墨烯中应变与掺杂的解耦策略及总有效应变评估

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-06-12 DOI: 10.1016/j.physe.2025.116311

Omar M. Dawood , Mahir N. Thameel , Alaa A. Al-Jobory , Sundus Alzuhairi

{"title":"A new decoupling strategy for strain and doping in wrinkled CVD graphene with total effective strain evaluation","authors":"Omar M. Dawood , Mahir N. Thameel , Alaa A. Al-Jobory , Sundus Alzuhairi","doi":"10.1016/j.physe.2025.116311","DOIUrl":"10.1016/j.physe.2025.116311","url":null,"abstract":"<div><div>The determination of strain levels in chemical vapor deposition (CVD) graphene is essential to maximize its electronic and optoelectronic applications. The combination of Raman shift effects with doping effects creates difficulties when attempting to precisely extract accurate deformation-related measurements. This research decouples strain from doping using Kelvin Probe Force Microscopy (KPFM), Raman spectroscopy, and high-resolution strain mapping. The research methodology allows precise mechanical strain measurement by properly distinguishing Raman shift effects from doping to enhance strain detection precision. Surface potential difference measured by KPFM enables determination of doping concentration values. Calibration factors applied to G-band and 2D-band Raman shifts enable the removal of doping effects so actual mechanical strain values become accessible. The Raman-derived in-plane strain measurement ranges from −0.34 % to −0.53 % for the G-band and −0.35 % to −0.67 % for the 2D-band. Substrate-induced distortions and wrinkle-induced out-of-plane deformations create compressive residual strain which is confirmed through curvature analysis and AFM topography measurements. The analysis from polarized Raman spectroscopy demonstrates that strain components for tension and compression follow the orientations of the wrinkles and deformations in the material. This advanced strain-doping decoupling method creates an exact measurement method to determine true graphene strain which may help accelerate use of strained graphene in electronic and optoelectronic devices and flexible systems as well as sensors.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"173 ","pages":"Article 116311"},"PeriodicalIF":2.9,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306395","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

Double-layer silicene nanoribbons controlled by carbon atoms: doping, adsorption, embedding 碳原子控制的双层硅纳米带：掺杂、吸附、包埋

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-06-11 DOI: 10.1016/j.physe.2025.116313

Linhan He, Lijun Wu, Ya Liu, Shuting Zhang, Hailu Xu

{"title":"Double-layer silicene nanoribbons controlled by carbon atoms: doping, adsorption, embedding","authors":"Linhan He, Lijun Wu, Ya Liu, Shuting Zhang, Hailu Xu","doi":"10.1016/j.physe.2025.116313","DOIUrl":"10.1016/j.physe.2025.116313","url":null,"abstract":"<div><div>In recent years, due to their compatibility with the mature silicon-based semiconductor industry, new silicene materials have attracted much attention due to their rational design and synthesis. This paper uses the SCC-DFTB method to study the effects of doping, adsorption and embedding carbon atoms on the electronic properties of double-layer silicene nanoribbons (SiNRs). The addition of carbon atoms causes significant changes in the geometric structure and energy band structure of SiNRs.Among them, under the three control methods, the structural stability and electronic properties of SiNRs are closely related to the concentration and position of carbon atoms. The band gap (Eg) increases or decreases regularly, and the electronic properties change from semiconductor to metal. The charge transfer trend after controlling three C atoms is also very different. The carbon atoms gain electrons (charge> 4.0), and the surrounding Si atoms lose electrons. These changes are due to the redistribution of charge. The p-orbital of silicon makes the main contribution, and the p-orbital of carbon makes a weak contribution. The concentration of carbon atoms can regulate the degree of hybridization. Introducing carbon atoms can be an accurate tool to effectively regulate the electronic properties of SiNRs, which can be used to customize the electronic properties of SiNRs and promote their application in the next generation of nanoelectronics and optoelectronic devices.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"173 ","pages":"Article 116313"},"PeriodicalIF":2.9,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271225","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

Multifunctional metamaterials based on VO2 for realizing dual-band absorption, cross-polarization conversion and asymmetric transmission 基于VO2的多功能超材料，实现双波段吸收、交叉极化转换和不对称传输

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-06-09 DOI: 10.1016/j.physe.2025.116312

Youjing Sun, Haorui Yang, Ying Zhu, Bin Tang

{"title":"Multifunctional metamaterials based on VO2 for realizing dual-band absorption, cross-polarization conversion and asymmetric transmission","authors":"Youjing Sun, Haorui Yang, Ying Zhu, Bin Tang","doi":"10.1016/j.physe.2025.116312","DOIUrl":"10.1016/j.physe.2025.116312","url":null,"abstract":"<div><div>In this work, we theoretically and numerically demonstrate a vanadium dioxide (VO<sub>2</sub>)-based multifunctional metamaterial capable of dynamically switching between diverse operational modes in the terahertz band. By exploiting the unique phase-transition properties of VO<sub>2</sub>, the presented metamaterial can achieve multiple tunable functionalities, including perfect absorption, cross-polarization conversion and asymmetric transmission (AT). When VO<sub>2</sub> is in the metallic state, the metamaterial acts as a dual-band perfect absorber with wide-angle and polarization insensitivity characteristics. Meanwhile, the metamaterial serves as a polarization converter, which can fulfill linear-to-linear (LTL) and linear-to-circular (LTC) polarization conversion. Specifically, the LTL polarization conversion rate reaches ∼100 % at 2.19 THz and 2.94 THz. And the ellipticity of the LTC polarization conversion is ±1 at the frequency range of 2.37–2.66 THz as well as the frequency points of 2.09 THz and 3.13 THz, indicating that the linear polarized waves can be completely converted into circularly polarized waves. Moreover, when VO<sub>2</sub> is in its insulating phase, the designed metamaterial exhibits an AT effect with an efficiency of 0.71. This innovative design offers valuable insights for the potential applications of multifunctional optoelectronic devices in the terahertz region.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"173 ","pages":"Article 116312"},"PeriodicalIF":2.9,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144262929","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

Trion and exciton superfluidity induced by the electron Fermi Sea 费米海电子诱导的Trion和激子超流动性

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-06-07 DOI: 10.1016/j.physe.2025.116310

Xuebing Gong , Huying Zheng , Xianghu Wang , Yue Wang , Dezhen Shen , Hai Zhu

{"title":"Trion and exciton superfluidity induced by the electron Fermi Sea","authors":"Xuebing Gong , Huying Zheng , Xianghu Wang , Yue Wang , Dezhen Shen , Hai Zhu","doi":"10.1016/j.physe.2025.116310","DOIUrl":"10.1016/j.physe.2025.116310","url":null,"abstract":"<div><div>The research of quantum many-body physics has always been regarded as an important goal of semiconductor strongly coupled microcavity systems. Here, we investigate the interaction mechanism between excitons and electrons in the Fermi Sea. In this case, the exciton-electron interaction can support a new bound state, i.e., trion, and the polariton is dressed by the polarization wave of the electron Fermi Sea, forming an exciton-polaron polariton (polaron-polariton). Meanwhile, the exciton-electron interaction renormalizes the energy and mass of the polariton and reduces the conditions for Bose-Einstein Condensation (BEC) and Kosterlitz-Thouless (KT) transition temperature occurrence. And the superfluid temperature always increases with the exciton-exciton scattering length. In addition, the spectral function, effective mass, scattering rate, KT transition temperature, response function, and conductivity of the polaron-polariton have been calculated in detail by using the Green's function. Our results provide a promising outlook for study the quantum many-body physics and strongly coupled Bose systems.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"173 ","pages":"Article 116310"},"PeriodicalIF":2.9,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254307","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 stability and multiple dynamic behaviors of aluminum nanostructures encapsulated in carbon nanotubes 碳纳米管封装铝纳米结构的结构稳定性和多重动力学行为

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-06-02 DOI: 10.1016/j.physe.2025.116308

Jianan Yuan , Chi Ding , Jianfu Li , Yong Liu , Jiani Lin , Xiaoli Wang

{"title":"Structural stability and multiple dynamic behaviors of aluminum nanostructures encapsulated in carbon nanotubes","authors":"Jianan Yuan , Chi Ding , Jianfu Li , Yong Liu , Jiani Lin , Xiaoli Wang","doi":"10.1016/j.physe.2025.116308","DOIUrl":"10.1016/j.physe.2025.116308","url":null,"abstract":"<div><div>Carbon nanotubes offer one-dimensional nanoconfinement space for metals, resulting in functional materials with novel physical properties. In this study, we successfully predicted a one-dimensional stable structure of aluminum confined within Carbon nanotubes using the MAGUS confined space search method. According to the phonon spectrum, this configuration is mechanically stable at ambient pressure and temperature. However, when the temperature reaches 350 K, aluminum atoms exhibit rotational and translational collective motions, eventually escaping from the open-boundary nanotube. By calculating the diffusion energy barrier of the aluminum, we elucidated the mechanism underlying these collective motion patterns. Through band structure calculations, we discovered strong orbital hybridization between aluminum and Carbon nanotubes. Our research reveals the stable form and unique dynamic and electrical properties of aluminum metal in Carbon nanotubes, providing new insights for the study of metal- Carbon nanotube composites.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"173 ","pages":"Article 116308"},"PeriodicalIF":2.9,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212139","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

Determining the purity of single-helical proteins from electronic specific heat measurements 用电子比热法测定单螺旋蛋白的纯度

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-06-02 DOI: 10.1016/j.physe.2025.116288

Sourav Kundu, Siddhartha Lal

{"title":"Determining the purity of single-helical proteins from electronic specific heat measurements","authors":"Sourav Kundu, Siddhartha Lal","doi":"10.1016/j.physe.2025.116288","DOIUrl":"10.1016/j.physe.2025.116288","url":null,"abstract":"<div><div>We present a theoretical investigation of the electronic specific heat (ESH) at constant volume (<span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>v</mi></mrow></msub></math></span>) of single-helical proteins modelled within the tight-binding (TB) framework. We study the effects of environment and biological defects on thermal properties of single-helical proteins. We employ a general TB model to incorporate all parameters relevant to the helical structure of proteins including the long-range hopping. In order to provide additional insights into our results for the ESH, we also study the electronic density of states for various disorder strengths. We observe that the variation of the specific heat with disorder is very different in low and high temperature regimes, though the variation of ESH with temperature possesses a universal pattern upon varying disorder strengths related to environmental effects. Lastly, we propose an interesting application of the ESH spectra of proteins. We show that by studying the ESH of single-helical proteins, one can distinguish a defective sample from a pure one. This observation can serve as the basis of a screening technique that can be applied prior to a whole genome testing, thereby saving valuable time & resources.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"173 ","pages":"Article 116288"},"PeriodicalIF":2.9,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144203017","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

Excellent spin-filtering and giant tunneling magnetoresistance in a van der Waals magnetic tunnel junction based on full-Heusler alloys Co2FeX (X = Si/Al) and 2D vdW materials WSe2/MoS2 基于全heusler合金Co2FeX （X = Si/Al）和二维vdW材料WSe2/MoS2的范德华磁隧道结具有优异的自旋滤波和巨大的隧道磁电阻

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-05-29 DOI: 10.1016/j.physe.2025.116299

Shagufta Parveen Asif Akhtar, Santashraya Prasad, Aminul Islam

{"title":"Excellent spin-filtering and giant tunneling magnetoresistance in a van der Waals magnetic tunnel junction based on full-Heusler alloys Co2FeX (X = Si/Al) and 2D vdW materials WSe2/MoS2","authors":"Shagufta Parveen Asif Akhtar, Santashraya Prasad, Aminul Islam","doi":"10.1016/j.physe.2025.116299","DOIUrl":"10.1016/j.physe.2025.116299","url":null,"abstract":"<div><div>We investigate multiple spin-filter magnetic tunnel junctions (sf-MTJs) based on 2D van der Waals (vdW) materials. WSe<sub>2</sub>/MoS<sub>2</sub> acts as a spin-filter tunnel barrier (TB) sandwiched between full-Heusler alloys Co<sub>2</sub>FeX (X = Si/Al) contacts. We demonstrate tunneling magnetoresistance (TMR) that is drastically enhanced with increasing TB layer thickness, reaching a record of 11,761.23 % for the Co<sub>2</sub>FeAl/3L-MoS<sub>2</sub>/Co<sub>2</sub>FeAl configuration. By leveraging Density Functional Theory (DFT) simulations and the Non-Equilibrium Green's Function (NEGF) formalism, the magnetic properties of ferromagnetic materials (FM), spin orbit coupling (SOC) of 2D TB materials, tunneling magnetoresistance (TMR), and I-V characteristics of MTJs are thoroughly studied. This comprehensive modelling via electrode interface engineering and simulation framework provides crucial insights into spin injection mechanisms and the behaviour of 2D material systems in spintronic applications.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"173 ","pages":"Article 116299"},"PeriodicalIF":2.9,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144194602","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