Topological Blount's theorem of odd-parity superconductors
Topological Blount's theorem of odd-parity superconductors
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DOI：
10.1103/physrevb.90.024516
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发表时间：
2014-07-23
影响因子：
3.7
通讯作者：
Sato, Masatoshi
中科院分区：
文献类型：
--
作者：
Kobayashi, Shingo;Shiozaki, Ken;Sato, Masatoshi
布朗特定理禁止在存在自旋轨道耦合（SOC）的情况下奇宇称超导体（SC）的线节点的存在。我们通过推广原始陈述并建立与表面零能态的关系，研究了反演对称下线节点的拓扑稳定性条件。奇宇称超导体中线节点的拓扑不稳定性意味着表面Rashba SOC导致相应的平坦零能表面色散消失，这为区分奇宇称超导体中的线节点与其他超导体中的线节点提供了实验手段。
Blount's theorem prohibits the existence of line nodes for odd-parity superconductors (SCs) in the presence of spin-orbit coupling (SOC). We studied the topological stability conditions of line nodes under inversion symmetry by generalizing the original statement and establishing a relation to surface zero-energy states. The topological instability of line nodes in odd-parity SCs implies the disappearance of corresponding flat zero-energy surface dispersions due to surface Rashba SOC, which provides an experimental means to distinguish line nodes in odd-parity SCs from those in other SCs.