The quantum anomalous Hall (QAH) effect, with its single chiral, topologically protected edge state, offers a platform for flying Majorana states as well as non-reciprocal microwave devices. While recent research showed the non-reciprocity of edge plasmons in Cr-doped (BixSb1-x)2Te3, the understanding of their dissipation remains incomplete. Our study explores edge plasmon dissipation in V-doped (BixSb1-x)2Te3 films, analyzing microwave transmission across various conditions. We identify interactions with charge puddles as a primary source of dissipation, providing insights critical for developing improved QAH-based technologies.
@article{arxiv.2405.19983,
title = {Propagation, dissipation and breakdown in quantum anomalous Hall edge states probed by microwave edge plasmons},
author = {Torsten Röper and Hugo Thomas and Daniel Rosenbach and Anjana Uday and Gertjan Lippertz and Anne Denis and Pascal Morfin and Alexey A. Taskin and Yoichi Ando and Erwann Bocquillon},
journal= {arXiv preprint arXiv:2405.19983},
year = {2025}
}