Photonic topological Anderson insulator in a two-dimensional atomic lattice

IF 1.3 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Comptes Rendus Physique Pub Date : 2022-12-07 DOI:10.5802/crphys.147

S. Skipetrov, P. Wulles

引用次数: 1

Abstract

Disorder in atomic positions can induce a topologically nontrivial phase - topological Anderson insulator (TAI) - for transverse electric optical quasimodes of a two-dimensional honeycomb lattice of immobile atoms. TAI requires both time-reversal and inversion symmetries to be broken to similar extents. It is characterized by a nonzero topological invariant, a reduced density of states and spatially localized quasimodes in the bulk, as well as propagating edge states. A transition from TAI to the topological insulator (TI) phase can take place at a constant value of the topological invariant, showing that TAI and TI represent the same topological phase.

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二维原子晶格中的光子拓扑Anderson绝缘体

原子位置的无序性可以诱导二维固定原子蜂窝晶格的横向电光学准模的拓扑非平凡相位-拓扑安德森绝缘子(TAI)。TAI要求时间反转和反演对称性都被破坏到相似的程度。它具有非零的拓扑不变量、减少的态密度和体中的空间局域准模，以及传播的边缘态。从TAI到拓扑绝缘子(TI)相的过渡可以在拓扑不变量的恒定值下发生，表明TAI和TI代表相同的拓扑相。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Comptes Rendus Physique 物理-天文与天体物理

CiteScore

2.80

自引率

0.00%

发文量

审稿时长

17.2 weeks

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