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An array of ring resonators specifically designed can perform as a topological insulator. We conduct simulations using both Tight-Binding Model (TBM) and Transfer Matrix Method (TMM) to analyze the transport properties of such optical…

光学 · 物理学 2016-09-20 Xiaohui Jiang , Yujie Chen , Chenxuan Yin , Yanfeng Zhang , Hui Chen , Siyuan Yu

We present a detailed analysis of the nature of electronic eigenfunctions in one-dimensional quasi-periodic chains based on a clustering idea recently introduced by us [Sil et al., Phys. Rev. {\bf B 48}, 4192 (1993) ], within the framework…

凝聚态物理 · 物理学 2009-10-22 Arunava Chakrabarti , S. N. Karmakar , R. K. Moitra

In this paper, we study the conductance of the graphene nanoribbons(GNRs) in the presence of the Stone-Wales(S-W) reconstruction, using the transfer matrix method. The ribbon is connected with semi-infinite quantum wires as the leads. The…

介观与纳米尺度物理 · 物理学 2015-05-07 Jing Wang , Guiping Zhang , Fei Ye , Xiaoqun Wang

High-entropy compounds, where multiple elements occupy a single crystallographic site in a highly disordered manner, challenge conventional understandings of electronic structure based on periodicity and well-defined band dispersion. Here,…

We study the reflection and transmission properties of a system comprising two whispering-gallery mode resonators, each containing a Zeeman-split quantum dot and side-coupled to an optical fiber. Our results demonstrate that unidirectional…

量子物理 · 物理学 2023-08-21 Gang Li , Ying-Qiao Zhang , Xing-Ri Jin

We study the transport properties of a single photon scattered by a two-level system (TLS) in a T-shaped waveguide, which is made of two coupled-resonator waveguides (CRWs)--- an infinite CRW and a semi-infinite CRW. The spontaneous…

量子物理 · 物理学 2015-08-27 Jing Lu , Z. H. Wang , Lan Zhou

In the present study, we revisit the theme of wave propagation in locally resonant granular crystal systems, also referred to as Mass-in-Mass systems. We use 3 distinct approaches to identify relevant traveling waves. The first consists of…

斑图形成与孤子 · 物理学 2015-06-23 H. Xu , P. G. Kevrekidis , A. Stefanov

Electric transport in semiconductor superlattices is dominated by pronounced negative differential conductivity. In this report the standard transport theories for superlattices, i.e. miniband conduction, Wannier-Stark-hopping, and…

介观与纳米尺度物理 · 物理学 2009-11-07 Andreas Wacker

Nanoelectromechanical resonators provide an ideal platform for investigating the interplay between electron transport and nonlinear mechanical motion. Externally driven suspended carbon nanotubes, containing an electrostatically defined…

We study electronic transport through a strongly interacting quantum dot by using the finite temperature extension of Wilson's numerical renormalization group (NRG) method. This allows the linear conductance to be calculated at all…

强关联电子 · 物理学 2007-05-23 T. A. Costi

A detailed understanding of charged defects in two-dimensional semiconductors is needed for the development of ultrathin electronic devices. Here, we study negatively charged acceptor impurities in monolayer WS$_2$ using a combination of…

We study the transport properties of disordered electron systems that contain perfectly conducting channels. Two quantum network models that belong to different universality classes, unitary and symplectic, are simulated numerically. The…

介观与纳米尺度物理 · 物理学 2009-04-10 Koji Kobayashi , Kosuke Hirose , Hideaki Obuse , Tomi Ohtsuki , Keith Slevin

The electronic and transport properties of atomic-size contacts are analyzed theoretically using a self-consistent tight-binding model. Our results show that, for s-like metals, a sufficiently narrow contact exhibits well defined resonant…

介观与纳米尺度物理 · 物理学 2016-08-15 A. Levy Yeyati , A. Martín-Rodero , F. Flores

Using functional renormalization methods, we study the one-loop renormalization group evolution of theories with four scalars, at second order in the derivative expansion, in which electroweak symmetry is nonlinearly realized. In this…

高能物理 - 理论 · 物理学 2014-09-09 Mahmoud Safari

The renormalization method is applied to investigate the electron transmission properties of a circuit containing a benzene molecule, in which one of the carbon atoms has been modified so as to simulate displacement in position or…

介观与纳米尺度物理 · 物理学 2016-07-08 Dong Qiu , Kenneth W. Sulston

Carbon nanotubes are of central importance for applications in nano-electronics thanks to their exceptional transport properties. They can be used as sensors, for example in biological applications, provided that they are functionalized to…

介观与纳米尺度物理 · 物理学 2020-04-14 Ghassen Jemaï , Jouda Khabthani , Guy Trambly de Laissardière , Didier Mayou

Charge transfer is a common phenomenon in van der Waals heterostructures with proper work function mismatch, which enables electrostatic gating to control band alignment and interlayer charge distributions. This provides a tunable platform…

强关联电子 · 物理学 2026-01-16 Yanran Shi , Min Li , Xin Lu , Jianpeng Liu

Structure-induced features of the wave functions for the quantum systems on complex networks are discussed in this paper. For a quantum system on a network, the state corresponding to the eigenvalue close to the center of the spectrum is…

无序系统与神经网络 · 物理学 2007-05-23 Huijie Yang , Fangcui Zhao , Yunpeng Wang , Binghong Wang

Topological edge states arise at the interface of two topologically-distinct structures and have two distinct features: they are localized and robust against symmetry protecting disorder. On the other hand, conventional transport in one…

介观与纳米尺度物理 · 物理学 2022-05-05 Jannatul Ferdous , Cem Yuce , Andrea Alù , Hamidreza Ramezani

We study excitation transport in a two-dimensional system of randomly assembled spins with power-law hopping in two dimensions. This model can be realized in cold atom quantum simulators with Rydberg atoms. In these experiments, due to the…

量子物理 · 物理学 2021-12-14 Jan Philipp Klinger , Martin Gärttner