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Magnetic flux periodicity in second order topological superconductors
Physical Review B ( IF 3.7 ) Pub Date : 2020-03-30 , DOI: 10.1103/physrevb.101.125429
Suman Jyoti De , Udit Khanna , Sumathi Rao

The magnetic flux periodicity of hc2e is a well-known manifestation of Cooper pairing in typical s-wave superconductors. In this paper we theoretically show that the flux periodicity of a two-dimensional second order topological superconductor, which features zero-energy Majorana modes localized at the corners of the sample, is hce instead. We further show that the periodicity changes back to hc2e at the transition to a topologically trivial superconductor, where the Majorana modes hybridize with the bulk states, demonstrating that the doubling of periodicity is a manifestation of the nontrivial topology of the state.

中文翻译:

二阶拓扑超导体中的磁通周期

磁通量的周期性 HC2Ë 是典型的Cooper配对的体现 s波超导体。在本文中,我们从理论上证明,二维零阶拓扑超导体的通量周期为零能量的马里亚纳模,其位于样品的拐角处,HCË代替。我们进一步表明,周期性变化回到HC2Ë 在过渡到拓扑无关紧要的超导体时,马约拉那模式与体态杂交,表明周期性加倍是状态的非平凡拓扑的体现。
更新日期:2020-03-30
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