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arXiv 1507.05089cond-mat.mes-hallcond-mat.str-elcond-mat.supr-con
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二维拓扑绝缘体中的超导抑制

Supercurrent Reversal in Two-Dimensional Topological Insulators

Alexander Zyuzin, Mohammad Alidoust, Jelena Klinovaja, Daniel Loss

摘要:

计算了外加磁场作用下二维拓扑绝缘体上的超导电流。当窄的二维拓扑绝缘体的边缘态杂化时,外部磁场可以关闭杂化能隙,从而驱动拓扑绝缘体从绝缘体到半金属态的量子相变。我们发现超导电流在量子相变处的符号反转揭示了拓扑绝缘体通过约瑟夫森效应的本征性质。

英文摘要:

We calculate supercurrent across a two-dimensional topological insulator subjected to an external magnetic field. When the edge states of a narrow two-dimensional topological insulator are hybridized, an external magnetic field can close the hybridization gap, thus driving a quantum phase transition from insulator to semimetal states of the topological insulator. We find a sign reversal of the supercurrent at the quantum phase transition revealing intrinsic properties of topological insulators via Josephson effect.

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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