We studied anomalous Josephson effect (AJE) in Josephson trijunctions fabricated on Bi2Se3, and found that the AJE in T-shaped trijunctions significantly alters the Majorana phase diagram of the trijunctions, when an in-plane magnetic field is applied parallel to two of the three single junctions. Such a phenomenon in topological insulator-based Josephson trijunction provides unambiguous evidence for the existence of AJE in the system, and might provide an additional knob for controlling the Majorana bound states in the Fu-Kane scheme of topological quantum computation.
@article{arxiv.2112.08646,
title = {Anomalous Josephson Effect in Topological Insulator-Based Josephson Trijunction},
author = {Xiang Zhang and Zhaozheng Lyu and Guang Yang and Bing Li and Yan-Liang Hou and Tian Le and Xiang Wang and Anqi Wang and Xiaopei Sun and Enna Zhuo and Guangtong Liu and Jie Shen and Fanming Qu and Li Lu},
journal= {arXiv preprint arXiv:2112.08646},
year = {2021}
}