Topological Superconductivity in Dirac Semimetals
Topological Superconductivity in Dirac Semimetals
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DOI：
10.1103/physrevlett.115.187001
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发表时间：
2015-10-29
影响因子：
8.6
通讯作者：
Sato, Masatoshi
中科院分区：
文献类型：
--
作者：
Kobayashi, Shingo;Sato, Masatoshi
狄拉克半金属的主体带接触狄拉克点和表面费米环。我们发展了狄拉克半金属超导理论。建立了狄拉克点与表面费米圈之间的关系，阐明了狄拉克半金属的非平凡拓扑结构对其超导态的影响。我们注意到，独特的狄拉克点的轨道纹理和晶体的结构相变有利于具有四重态表面马约拉纳费米子的拓扑超导性。我们建议我们的理论可能的应用到最近发现的超导态Cd3As2。
Dirac semimetals host bulk band-touching Dirac points and a surface Fermi loop. We develop a theory of superconducting Dirac semimetals. Establishing a relation between the Dirac points and the surface Fermi loop, we clarify how the nontrivial topology of Dirac semimetals affects their superconducting state. We note that the unique orbital texture of Dirac points and a structural phase transition of the crystal favor symmetry-protected topological superconductivity with a quartet of surface Majorana fermions. We suggest the possible application of our theory to recently discovered superconducting states in Cd3As2.