In search of fault-tolerant topological quantum computation (TQC), zero-bias conductance peak as a necessary signature of Majorana zero modes (MZMs) has been observed in a number of solid-state systems. Here, we present the signature of MZMs from a phase-sensitive experiment on Josephson trijunctions constructed on the surface of three-dimensional topological insulators. We observed that the minigap at the center of the trijunction is protected to close over extended regions in phase space, supporting in principle the Majorana phase diagram proposed by Fu and Kane in 2008. Our study paves the way for further braiding MZMs and exploring TQC on a scalable two-dimensional platform.
@article{arxiv.1904.02677,
title = {Evidence of Majorana Zero Modes in Josephson Trijunctions},
author = {Guang Yang and Zhaozheng Lyu and Junhua Wang and Jianghua Ying and Xiang Zhang and Jie Shen and Guangtong Liu and Jie Fan and Zhongqing Ji and Xiunian Jing and Fanming Qu and Li Lu},
journal= {arXiv preprint arXiv:1904.02677},
year = {2019}
}