The iron-based superconductors (FeSCs) have recently emerged as a promising single-material Majorana platform by hosting isolated Majorana zero modes (MZMs) at relatively high temperatures. To further verify its Majorana nature and move forward to build topological quantum qubit, it is highly desirable to achieve tunability for MZMs on homogeneous FeSCs. Here, with an in-situ strain device, we can controllably create MZMs on the homogeneous surface of stoichiometric superconductor LiFeAs by inducing a topological phase transition. The evolution of discrete energy modes inside a strained vortex is found to mimics exactly as the predicted topological vortex case, proving the Majorana nature of emerging zero modes of vortex. Such tunability of MZMs in a homogeneous superconductor is an important step toward their application in topological quantum computation.
@article{arxiv.2111.03786,
title = {Tunable vortex Majorana modes controlled by strain in homogeneous LiFeAs},
author = {Wenyao Liu and Quanxin Hu and Xiancheng Wang and Yigui Zhong and Fazhi Yang and Lingyuan Kong and Lu Cao and Geng Li and Kozo Okazaki and Takeshi Kondo and Changqing Jin and Fuchun Zhang and Jinpeng Xu and Hong-Jun Gao and Hong Ding},
journal= {arXiv preprint arXiv:2111.03786},
year = {2023}
}