After the recognition of the possibility to implement Majorana fermions using the building blocks of solid-state matters, the detection of this peculiar particle has been an intense focus of research. Here we experimentally demonstrate a collection of Majorana fermions living in a one-dimensional transport channel at the boundary of a superconducting quantum anomalous Hall insulator thin film. A series of topological phase changes are controlled by the reversal of the magnetization, where a half-integer quantized conductance plateau (0.5e2/h) is observed as a clear signature of the Majorana phase. This transport signature can be well repeated during many magnetic reversal sweeps, and can be tracked at different temperatures, providing a promising evidence of the chiral Majorana edge modes in the system.
@article{arxiv.1606.05712,
title = {Chiral Majorana edge state in a quantum anomalous Hall insulator-superconductor structure},
author = {Qing Lin He and Lei Pan and Alexander L. Stern and Edward Burks and Xiaoyu Che and Gen Yin and Jing Wang and Biao Lian and Quan Zhou and Eun Sang Choi and Koichi Murata and Xufeng Kou and Tianxiao Nie and Qiming Shao and Yabin Fan and Shou-Cheng Zhang and Kai Liu and Jing Xia and Kang L. Wang},
journal= {arXiv preprint arXiv:1606.05712},
year = {2017}
}