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arXiv 1102.0360cond-mat.supr-concond-mat.mes-hall
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层状拓扑超导体中的不成对Majorana费米子

Unpaired Majorana fermions in a layered topological superconductor

Babak Seradjeh, Eytan Grosfeld

摘要:

研究了层状拓扑超导体涡旋线两端或侧边存在不成对Majorana模的条件。我们发现,这个问题被映射到一个一般的马约拉纳链和扩展Kitaev的条件,其非平凡相的存在提供了一个额外的条件时,在链中的超电流流动。如果自旋-轨道耦合具有一定的层内分量,则未成对的马约拉纳束缚态可能存在于穿过层的涡线中,但有趣的是,只有当沿着涡保持非零超电流时才存在。我们讨论了交换统计的旋涡中存在的不成对的马约拉纳模式和评论他们的实验检测。

英文摘要:

We study the conditions for the existence of unpaired Majorana modes at the ends of vortex lines or the side edges of a layered topological superconductor. We show that the problem is mapped to that of a general Majorana chain and extend Kitaev's condition for the existence of its nontrivial phase by providing an additional condition when a supercurrent flows in the chain. Unpaired Majorana bound states may exist in a vortex line that threads the layers if the spin-orbit coupling has certain in-layer components but, interestingly, only if a nonzero supercurrent is maintained along the vortex. We discuss the exchange statistics of vortices in the presence of unpaired Majorana modes and comment on their experimental detection.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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