Edge states and local electronic structure around an adsorbed impurity in a topological superconductor
Abstract
Recently topological superconducting states has attracted a lot of interest. In this work, we consider a topo- logical superconductor with topological mirror order [1] and s-wave superconducting pairing symmetry, within a two-orbital model originally designed for iron-based superconductivity [2]. We predict the existence of gapless edge states. We also study the local electronic structure around an adsorbed interstitial magnetic impurity in the system, and find the existence of low-energy in-gap bound states even with a weak spin polar- ization on the impurity. We also discuss the relevance of our results to the recent STM experiment on Fe(Te,Se) compound with adsorbed Fe impurity [3], for which our density functional calculations show the Fe impurity is spin polarized.
Keywords
Cite
@article{arxiv.1507.05904,
title = {Edge states and local electronic structure around an adsorbed impurity in a topological superconductor},
author = {Yuan-Yen Tai and Hongchul Choi and Towfiq Ahmed and C. S. Ting and Jian-Xin Zhu},
journal= {arXiv preprint arXiv:1507.05904},
year = {2015}
}