Topological superconductivity in a Bi2Te3/NbSe2 heterostructure: A review

Topological superconductivity in a Bi2Te3/NbSe2 heterostructure: A review
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Bi2Te3/NbSe2 异质结构中的拓扑超导:综述

DOI:
10.1088/1674-1056/28/6/067403
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发表时间:
2019-06
期刊:
影响因子:
1.7
通讯作者:
Jia Jin-Feng
Jia Jin-Feng
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Zheng Hao;Jia Jin-Feng

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拓扑超导体具有全局保护的无隙边界激发,在局部扰动下具有鲁棒性,因此具有重要的基础和应用价值。一个非传统的配对与p波对称,如一个非平凡的拓扑结构在超导体的波函数,需要产生一个非零的贝瑞相位。Bi 2 Te 3/2 H-NbSe 2异质结是一种在真实的材料中实现拓扑超导体的可行方法。在这个复杂的系统中,由于底层s波超导体2 H-NbSe 2的近似效应,拓扑绝缘体Bi 2 Te 3上的奇数个自旋动量锁定狄拉克锥表面态变得超导,实现了有效的二维(2D)无自旋
Topological superconductors carry globally protected gapless boundary excitations, which are robust under local perturbations, and thus exhibit both fundamental and applicational importance. An unconventional pairing with p-wave symmetry, such as a nontrivial topology in the superconductor's wavefunction, is required to generate a non-zero Berry phase. Until now, the Bi 2 Te 3/2H–NbSe 2 heterostructure has proven to be a practical way to realize a topological superconductor in real materials. This complex system, where odd numbers of spin-momentum locked Dirac cone surface states on the topological insulator Bi 2 Te 3 become superconducting, induced by the proximate effect from the underlying s-wave superconductor 2H–NbSe 2, realizes an effective two-dimensional (2D) spinless
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