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JIN, Kyung-Hwan
원자제어 저차원 전자계 연구단
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Prediction of intrinsic topological superconductivity in Mn-doped GeTe monolayer from first-principles

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Title
Prediction of intrinsic topological superconductivity in Mn-doped GeTe monolayer from first-principles
Author(s)
Zhang, Xiaoming; Kyung-Hwan Jin; Mao, Jiahao; Zhao, Mingwen; Liu, Zheng; Liu, Feng
Publication Date
2021-03
Journal
NPJ COMPUTATIONAL MATERIALS, v.7, no.1
Publisher
NATURE RESEARCH
Abstract
The recent discovery of topological superconductors (TSCs) has sparked enormous interest. The realization of TSC requires a delicate tuning of multiple microscopic parameters, which remains a great challenge. Here, we develop a first-principles approach to quantify realistic conditions of TSC by solving self-consistently Bogoliubov-de Gennes equation based on a Wannier function construction of band structure, in presence of Rashba spin-orbit coupling, Zeeman splitting and electron-phonon coupling. We further demonstrate the power of this method by predicting the Mn-doped GeTe (Ge1-xMnxTe) monolayer-a well-known dilute magnetic semiconductor showing superconductivity under hole doping-to be a Class D TSC with Chern number of -1 and chiral Majorana edge modes. By constructing a first-principles phase diagram in the parameter space of temperature and Mn concentration, we propose the TSC phase can be induced at a lower-limit transition temperature of similar to 40 mK and the Mn concentration of x similar to 0.015%. Our approach can be generally applied to TSCs with a phonon-mediated pairing, providing useful guidance for future experiments.
URI
https://pr.ibs.re.kr/handle/8788114/9757
DOI
10.1038/s41524-021-00511-x
ISSN
2057-3960
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > 1. Journal Papers (저널논문)
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