文章基本信息

标题：Pressure controlled transition into a self-induced topological superconducting surface state
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作者：Zhiyong Zhu ; Yingchun Cheng ; Udo Schwingenschlögl 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：4
期号：1
DOI：10.1038/srep04025
语种：English
出版社：Springer Nature
摘要：Ab-initio calculations show a pressure induced trivial-nontrivial-trivial topological phase transition in the normal state of 1 T -TiSe₂. The pressure range in which the nontrivial phase emerges overlaps with that of the superconducting ground state. Thus, topological superconductivity can be induced in protected surface states by the proximity effect of superconducting bulk states. This kind of self-induced topological surface superconductivity is promising for a realization of Majorana fermions due to the absence of lattice and chemical potential mismatches. For appropriate electron doping, the formation of the topological superconducting surface state in 1 T -TiSe₂ becomes accessible to experiments as it can be controlled by pressure.