Spectroscopic fingerprint of chiral Majorana modes at the edge of a quantum anomalous Hall insulator/ superconductor heterostructure

Junying Shen, Jian Lyu, Jason Z. Gao, Ying Ming Xie, Chui Zhen Chen, Chang woo Cho, Omargeldi Atanov, Zhijie Chen, Kai Liu, Yajian J. Hu, King Yau Yip, Swee K. Goh, Qing Lin He, Lei Pan, Kang L. Wang, Kam Tuen Law, Rolf Lortz

研究成果: Article同行評審

4 引文 斯高帕斯(Scopus)

摘要

With the recent discovery of the quantum anomalous Hall insulator (QAHI), which exhibits the conductive quantum Hall edge states without external magnetic field, it becomes possible to create a topological superconductor (SC) by introducing superconductivity into these edge states. In this case, 2 distinct topological superconducting phases with 1 or 2 chiral Majorana edge modes were theoretically predicted, characterized by Chern numbers (N) of 1 and 2, respectively. We present spectroscopic evidence from Andreev reflection experiments for the presence of chiral Majorana modes in an Nb/(Cr0.12Bi0.26Sb0.62)2Te3 heterostructure with distinct signatures attributed to 2 different topological superconducting phases. The results are in qualitatively good agreement with the theoretical predictions.

原文English
頁(從 - 到)238-242
頁數5
期刊Proceedings of the National Academy of Sciences of the United States of America
117
發行號1
DOIs
出版狀態Published - 2020 一月 7

All Science Journal Classification (ASJC) codes

  • General

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