arXiv: Mesoscale and Nanoscale Physics最新文献_第5页

Thermal effects and spontaneous frictional relaxation in atomically thin layered materials 原子薄层材料中的热效应和自发摩擦松弛

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-12-01 DOI: 10.1103/PhysRevB.103.195441

J. Sheehan, David Andersson, A. S. de Wijn

引用次数: 0

Magnon thermal Edelstein effect detected by inverse spin Hall effect 用逆自旋霍尔效应检测磁振子热爱德斯坦效应

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-11-30 DOI: 10.1063/5.0030368

Hantao Zhang, R. Cheng

引用次数: 6

Quasicrystalline electronic states in twisted bilayers and the effects of interlayer and sublattice symmetries 扭曲双层中的准晶电子态及层间和亚晶格对称性的影响

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-11-30 DOI: 10.1103/PHYSREVB.103.045408

J. A. Crosse, P. Moon

{"title":"Quasicrystalline electronic states in twisted bilayers and the effects of interlayer and sublattice symmetries","authors":"J. A. Crosse, P. Moon","doi":"10.1103/PHYSREVB.103.045408","DOIUrl":"https://doi.org/10.1103/PHYSREVB.103.045408","url":null,"abstract":"We study the electronic structure of quasicrystals composed of incommensurate stacks of atomic layers. We consider two systems: a pair of square lattices with a relative twist angle of $theta=45^circ$ and a pair of hexagonal lattices with a relative twist angle of $theta=30^circ$, with various interlayer interaction strengths. This constitutes every two-dimensional bilayer quasicrystal system. We investigate the resonant coupling governing the quasicrystalline order in each quasicrystal symmetry, and calculate the quasi-band dispersion. The resonant interaction emerges in bilayer quasicrystals if all the dominant interlayer interactions occur between the atomic orbitals that have the same magnetic quantum number. Thus, not only the quasicrystal composed of the widely studied graphene, but also those composed of transition metal dichalcogenides will exhibit the quasicrystalline states. We find that some quasicrystalline states, which are usually obscured by decoupled monolayer states, are more prominent, i.e., \"exposed\", in the systems with strong interlayer interaction. We also show that we can switch the states between quasicrystalline configuration and its layer components, by turning on and off the interlayer symmetry.","PeriodicalId":8465,"journal":{"name":"arXiv: Mesoscale and Nanoscale Physics","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91445137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Topological superconductivity in tripartite superconductor-ferromagnet-semiconductor nanowires 三元超导体-铁磁-半导体纳米线的拓扑超导性

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-11-30 DOI: 10.1103/PHYSREVB.103.165301

Josias Langbehn, Sergio Acero González, P. Brouwer, F. von Oppen

引用次数: 6

Electron density effect on spin-orbit interaction in [001] GaAs quantum wells. [001] GaAs量子阱中电子密度对自旋轨道相互作用的影响。

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-11-29 DOI: 10.1103/PhysRevB.103.195306

P. Alekseev, M. Nestoklon

引用次数: 1

Few-Electron Single and Double Quantum Dots in an InAs Two-Dimensional Electron Gas InAs二维电子气体中的少电子单量子点和双量子点

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-11-27 DOI: 10.1103/PRXQUANTUM.2.010321

C. Mittag, J. Koski, M. Karalic, C. Thomas, A. Tuaz, A. Hatke, G. Gardner, M. Manfra, J. Danon, T. Ihn, K. Ensslin

{"title":"Few-Electron Single and Double Quantum Dots in an \u0000InAs\u0000 Two-Dimensional Electron Gas","authors":"C. Mittag, J. Koski, M. Karalic, C. Thomas, A. Tuaz, A. Hatke, G. Gardner, M. Manfra, J. Danon, T. Ihn, K. Ensslin","doi":"10.1103/PRXQUANTUM.2.010321","DOIUrl":"https://doi.org/10.1103/PRXQUANTUM.2.010321","url":null,"abstract":"Most proof-of-principle experiments for spin qubits have been performed using GaAs-based quantum dots because of the excellent control they offer over tunneling barriers and the orbital and spin degrees of freedom. Here, we present the first realization of high-quality single and double quantum dots hosted in an InAs two-dimensional electron gas (2DEG), demonstrating accurate control down to the few-electron regime, where we observe a clear Kondo effect and singlet-triplet spin blockade. We measure an electronic $g$-factor of $16$ and a typical magnitude of the random hyperfine fields on the dots of $sim 0.6, mathrm{mT}$. We estimate the spin-orbit length in the system to be $sim 5-10, mu mathrm{m}$, which is almost two orders of magnitude longer than typically measured in InAs nanostructures, achieved by a very symmetric design of the quantum well. These favorable properties put the InAs 2DEG on the map as a compelling host for studying fundamental aspects of spin qubits. Furthermore, having weak spin-orbit coupling in a material with a large Rashba coefficient potentially opens up avenues for engineering structures with spin-orbit coupling that can be controlled locally in space and/or time.","PeriodicalId":8465,"journal":{"name":"arXiv: Mesoscale and Nanoscale Physics","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84930779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Plasmonic modes at inclined edges of anisotropic two-dimensional materials 各向异性二维材料倾斜边缘的等离子体模式

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-11-26 DOI: 10.1103/PHYSREVB.103.155402

A. A. Sokolik, O. Kotov, Y. Lozovik

{"title":"Plasmonic modes at inclined edges of anisotropic two-dimensional materials","authors":"A. A. Sokolik, O. Kotov, Y. Lozovik","doi":"10.1103/PHYSREVB.103.155402","DOIUrl":"https://doi.org/10.1103/PHYSREVB.103.155402","url":null,"abstract":"Confined modes at the edge arbitrarily inclined with respect to optical axes of nonmagnetic anisotropic 2D materials are considered. By developing the exact Wiener-Hopf and approximated Fetter methods we studied edge modes dispersions, field and charge density distributions. The 2D layer is described by the Lorentz-type conductivities in one or both directions, which is realistic for natural anisotropic 2D materials and resonant hyperbolic metasurfaces. We demonstrate that, due to anisotropy, the edge mode exists only at wave vectors exceeding the nonzero threshold value if the edge is tilted with respect to the direction of the resonant conductivity. The dominating contribution to field and charge density spatial profiles is provided by evanescent 2D waves, which are confined both in space near the 2D layer and along the layer near its edge. The degree of field confinement along the layer is determined by wave vector or frequency mismatch between the edge mode and continuum of freely propagating 2D modes. Our analysis is suitable for various types of polaritons (plasmon-, phonon-, exciton-polaritons etc.) at large enough wave vectors. Thanks to superior field confinement in all directions perpendicular to the edge these modes look promising for modern plasmonics and sensorics.","PeriodicalId":8465,"journal":{"name":"arXiv: Mesoscale and Nanoscale Physics","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80871753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Electron hydrodynamics of two-dimensional anomalous Hall materials 二维反常霍尔材料的电子流体力学

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-11-25 DOI: 10.1103/PHYSREVB.103.125106

E. H. Hasdeo, J. Ekström, E. Idrisov, T. Schmidt

引用次数: 15

Designer flat bands in quasi-one-dimensional atomic lattices 准一维原子晶格中的设计平带

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-11-25 DOI: 10.1103/physrevresearch.2.043426

M. N. Huda, S. Kezilebieke, P. Liljeroth

{"title":"Designer flat bands in quasi-one-dimensional atomic lattices","authors":"M. N. Huda, S. Kezilebieke, P. Liljeroth","doi":"10.1103/physrevresearch.2.043426","DOIUrl":"https://doi.org/10.1103/physrevresearch.2.043426","url":null,"abstract":"Certain lattices with specific geometries have one or more spectral bands that are strictly flat, i.e. the electron energy is independent of the momentum. This can occur robustly irrespective of the specific couplings between the lattices sites due to the lattice symmetry, or it can result from fine-tuned couplings between the lattice sites. While the theoretical picture behind flat electronic bands is well-developed, experimental realization of these lattices has proven challenging. Utilizing scanning tunnelling microscopy (STM) and spectroscopy (STS), we manipulate individual vacancies in a chlorine monolayer on Cu(100) to construct various atomically precise 1D lattices with engineered flat bands. We realize experimentally both gapped and gapless flat band systems with single or multiple flat bands. We also demonstrate tuneability of the energy of the flat bands and how they can be switched \"on\" and \"off\" by breaking and restoring the symmetry of the lattice geometry. The experimental findings are corroborated by tight-binding calculations. Our results constitute the first experimental realizations of engineered flat bands in a 1D solid-state system and pave the way towards the construction of e.g. topological flat band systems and experimental tests of flat-band-assisted superconductivity in a fully controlled system.","PeriodicalId":8465,"journal":{"name":"arXiv: Mesoscale and Nanoscale Physics","volume":"84 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88411138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 28

Equilibration and filtering of quantum Hall edge states in few-layer black phosphorus 黑磷中量子霍尔边缘态的平衡与滤波

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-11-24 DOI: 10.1103/physrevmaterials.4.114008

Jiawei Yang, Kangyu Wang, S. Che, Zachary J. Tuchfeld, Kenji Watanabe, T. Taniguchi, D. Shcherbakov, S. Moon, D. Smirnov, Ruoyu Chen, M. Bockrath, C. N. Lau

引用次数: 1