期刊
NPJ COMPUTATIONAL MATERIALS
卷 7, 期 1, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41524-021-00511-x
关键词
-
资金
- DOE-BES [DE-FG02-04ER46148]
- National Natural Science Foundation of China (NSFC) [12004357]
- Natural Science Foundation of Shandong Province [ZR2020QA053]
- Young Talents Project at Ocean University of China
- NSFC [11774196, 21433006, 11774201]
- Tsinghua University Initiative Scientific Research Program
- Institute for Basic Science [IBS-R014-Y1]
- National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2019H1D3A1A01071056]
- National Research Foundation of Korea [2019H1D3A1A01071056] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The recent discovery of topological superconductors has attracted significant interest, yet achieving them still poses a great challenge due to the need for precise tuning of multiple microscopic parameters. Researchers have developed a first-principles approach based on solving the Bogoliubov-de Gennes equation to quantify the realistic conditions of topological superconductors, successfully predicting a manganese-doped GeTe monolayer to exhibit topological superconductivity.
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据