Abstract
A 2D HgTe quantum well is analyzed based on the assumption that the width fluctuations convert the system to a random mixture of domains with positive and negative energy gaps. The borders between ordinary and topological insulator phases form a network of the edge states covering the entire sample. The optical transitions within the edge states yield a 2D absorption. The qualitative consideration is based on the model of optical intraedge transitions in curved edge states together with percolation arguments.
Original language | English |
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Article number | 1800652 |
Number of pages | 5 |
Journal | Physica Status Solidi (B) Basic Research |
Volume | 256 |
Issue number | 6 |
DOIs | |
Publication status | Published - 1 Jun 2019 |
Keywords
- edge states
- microwave absorption
- percolation
- random two-dimensional topological insulators