物理
拓扑绝缘体
高次谐波产生
色散关系
电子
谱线
凝聚态物理
带隙
GSM演进的增强数据速率
谐波
拓扑(电路)
激光器
量子力学
电信
数学
组合数学
计算机科学
作者
Christoph Jürß,Dieter Bauer
出处
期刊:Physical review
日期:2022-08-05
卷期号:106 (5)
被引量:1
标识
DOI:10.1103/physrevb.106.054303
摘要
Edge states play a major role in the electron dynamics of topological insulators as they are the only conducting part in such materials. In this work we consider the Haldane model for a two-dimensional topological insulator, subjected to an intense laser field. We compare the numerically simulated high-harmonic generation (HHG) in the bulk of the Haldane model to HHG in corresponding finite flakes with edge states present, and explain the differences. In particular, peaks for energies below the bulk band gap appear in the spectra for the finite flakes. The positions of these peaks show a strong dependence on the size of the flakes, which can be explained using the dispersion relation for the edge states.
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