Physica E-low-dimensional Systems & Nanostructures最新文献_第7页

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

VO2-operated stub and rectangular cavity-based plasmonic refractive index sensor for biomolecules detection 用于生物分子检测的基于vo2的短段和矩形腔的等离子体折射率传感器

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.2025.116307

Diksha Chauhan , Zen Sbeah , Vishal Sorathiya , Ram Prakash Dwivedi

{"title":"VO2-operated stub and rectangular cavity-based plasmonic refractive index sensor for biomolecules detection","authors":"Diksha Chauhan , Zen Sbeah , Vishal Sorathiya , Ram Prakash Dwivedi","doi":"10.1016/j.physe.2025.116307","DOIUrl":"10.1016/j.physe.2025.116307","url":null,"abstract":"<div><div>This paper introduces a theoretical study of plasmonic metal insulator metal (MIM) sensor based on a rectangular resonator with a stub structure. The integration of VO<sub>2</sub> in the stub in a MIM waveguide configuration introduces a novel approach for tunable sensing for biomolecules and refractive index sensing applications. The sensing property of the device is analyzed for both the insulator and metallic states of the VO<sub>2</sub> showing enhanced resonance peaks for refractive index sensing. The device achieves a sensitivity of 666nm/RIU for its two resonance modes with quality factor (Q) of 47.56 and figure of merit (FOM) of 18 for water, acetone and dimethyl sulfoxide. Further, the device shows its strong biosensing potential by detecting numerous brain cancer cell components and differentiating between DNA samples. For brain cancer detection, maximum sensitivity of 950.11 nm/RIU and 826.11nm/RIU is achieved for the metallic and insulator state of VO<sub>2</sub> respectively. In the insulator state, a Q factor of 91 and FOM of 33.2 is achieved for Medulloblastoma, whereas for the metallic state of VO<sub>2</sub>, an FOM of 47.5 and a Q factor of 57 is obtained. Additionally, the device can also differentiate between different DNA samples and can achieve Q of 62 and FOM of 22. Device optimizations are performed by changing device parameters and their significant effect on device's performance has been observed. The highest quality factor of 86 is calculated by changing the internal dimensions of the rectangular cavity. With the ability to detect numerous refractive indexes in the range from 1.33 to 1.56, the proposed device offers significant applications for biosensing and refractive index based applications.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"173 ","pages":"Article 116307"},"PeriodicalIF":2.9,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144194603","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

Three-frequency optical switch with dynamically tunable and polarimetric insensitive multifunctional device 三频光开关，动态可调，偏振不敏感多功能装置

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-05-28 DOI: 10.1016/j.physe.2025.116297

Li jie , Jun Zhu , Xiner Chen

{"title":"Three-frequency optical switch with dynamically tunable and polarimetric insensitive multifunctional device","authors":"Li jie , Jun Zhu , Xiner Chen","doi":"10.1016/j.physe.2025.116297","DOIUrl":"10.1016/j.physe.2025.116297","url":null,"abstract":"<div><div>Plasmon-Induced Transparency (PIT) has garnered considerable research attention across diverse photonic architectures, spanning photonic crystal resonators, metal-insulator-metal (MIM) waveguides, plasmonic grating arrays, and micro-electro-mechanical systems (MEMS). This study presents a dynamic tunable multifunctional photonic device based on a graphene-VO<sub>2</sub> composite structure. By designing a metasurface, a polarization-independent plasmon-induced transparency (PIT) effect is achieved, showcasing a novel approach to integrating the tunability of graphene and VO<sub>2</sub>. The device enables dual-mode dynamic control, with optical switching performance including a 98 % modulation depth, 1.28 dB insertion loss, and 16.78 dB extinction ratio. Additionally, it exhibits significant slow-light effects, with a maximum group index of 633. This design combines dual-mode dynamic adjustability, polarization insensitivity, and the functionality of optical switches, providing a new development direction for integrated photonic devices and having potential application prospects in the fields of optical communication and sensing.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"173 ","pages":"Article 116297"},"PeriodicalIF":2.9,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144230542","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 the tilt on the three-dimensional quantum Hall effect in tilted Weyl semimetals 倾斜对倾斜Weyl半金属中三维量子霍尔效应的影响

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-05-27 DOI: 10.1016/j.physe.2025.116289

Mingqi Chang , Rong Ma , Li Sheng

{"title":"Effect of the tilt on the three-dimensional quantum Hall effect in tilted Weyl semimetals","authors":"Mingqi Chang , Rong Ma , Li Sheng","doi":"10.1016/j.physe.2025.116289","DOIUrl":"10.1016/j.physe.2025.116289","url":null,"abstract":"<div><div>Three-dimensional (3D) quantum Hall effect (QHE) in Weyl semimetal has attracted intense interests recent years. In this paper, we theoretically investigate the 3D QHE in tilted Weyl semimetals from bulk states for magnetic field parallel to the separation of Weyl nodes. According to the correspondence between bulk Chern number and Hall conductivity, we analytically calculate the Hall conductivity as a function of Fermi energy and the tilted terms in a thin film of a tilted Weyl semimetal using periodic boundary condition. The width of the Hall plateaus as a function of Fermi energy is influenced by the tilted terms and the energy gap between the <span><math><mrow><mi>n</mi><mo>=</mo><mo>−</mo><mn>1</mn></mrow></math></span> and <span><math><mrow><mi>n</mi><mo>=</mo><mn>1</mn></mrow></math></span> Landau levels (LLs). When the two Weyl nodes tilt to the same direction and tilt away from each others, the plateau width decreases as a quadratic function and linear function respectively as the tilt increases. When the two Weyl nodes tilt towards to each other, the plateau width increases as a linear function. However, the width is limited by the energy gap between the <span><math><mrow><mi>n</mi><mo>=</mo><mo>−</mo><mn>1</mn></mrow></math></span> and <span><math><mrow><mi>n</mi><mo>=</mo><mn>1</mn></mrow></math></span> LLs which decreases as the tilt increases. We also numerically calculate the Hall conductivity using open boundary condition and the numerical results show well consistent with the analytical results. Our study can be significant for understanding the effects of tilt on the 3D QHE in tilted Weyl semimetals.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"173 ","pages":"Article 116289"},"PeriodicalIF":2.9,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147353","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

Influence of phonon focusing on the anisotropy of the drag thermopower in single-crystalline nanowires based on noble metals 声子聚焦对贵金属单晶纳米线拖曳热能各向异性的影响

IF 2.9 3区物理与天体物理

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-05-23 DOI: 10.1016/j.physe.2025.116298

I.I. Kuleyev, I.G. Kuleyev

{"title":"Influence of phonon focusing on the anisotropy of the drag thermopower in single-crystalline nanowires based on noble metals","authors":"I.I. Kuleyev, I.G. Kuleyev","doi":"10.1016/j.physe.2025.116298","DOIUrl":"10.1016/j.physe.2025.116298","url":null,"abstract":"<div><div>We have investigated the influence of phonon focusing on the electron-phonon drag and thermopower in Au-, Ag-, and Cu-based nanowires at low temperatures. Also, we have examined the role of quasi-longitudinal and quasi-transverse phonons, as well as shear waves in the drag thermopower of the nanostructures. The anisotropy of the lattice drag thermopower, thermal conductivity, and phonon mean free paths in noble metal-based nanowires is analyzed in the Knudsen phonon gas flow regime. In this case, the drag thermopower of nanowires follows the temperature dependence <span><math><mrow><msub><mi>α</mi><mtext>drag</mtext></msub><mo>∼</mo><msup><mi>T</mi><mn>4</mn></msup></mrow></math></span>, with a dominant contribution of the slow quasi-transverse <em>t</em><sub>2</sub>-mode for all heat flux directions. It is shown that, under conditions of competition between boundary and volume mechanisms of phonon relaxation, the anisotropy of the drag thermopower in Ag crystals decreases monotonically as the cross-section of nanowires increases and disappears when the cross-section is <span><math><mrow><mi>D</mi><mo>></mo><msup><mn>10</mn><mn>2</mn></msup></mrow></math></span> μm.</div></div>","PeriodicalId":20181,"journal":{"name":"Physica E-low-dimensional Systems & Nanostructures","volume":"173 ","pages":"Article 116298"},"PeriodicalIF":2.9,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169931","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