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arXiv 1306.6343cond-mat.mes-hall
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混合正常-超导环中Majorana费米子的签名

Signatures of Majorana fermions in hybrid normal-superconducting rings

Philippe Jacquod, Markus Buttiker

摘要:

本文研究了库仑阻塞拓扑超导段中断的金属环中的持续电流。我们表明,在超导体中的马约拉纳束缚态的存在下,反映在持续电流,其符号是由超导体的费米子宇称的H/E谐波的出现。马约拉纳束缚态进一步使电流在零通量时是有限的,然而由此产生的持续电流的特殊对称性与自由能是相容的,即使在时间反演对称性破缺场中也是如此。持续电流的这些独特的功能是强大的,对无序,并提供明确的签名存在的马约拉纳费米子。

英文摘要:

We investigate persistent currents in metallic rings interrupted by a Coulomb blockaded topological superconducting segment. We show that the presence of Majorana bound states in the superconductor is reflected in the emergence of an h/e harmonics in the persistent current, whose sign is determined by the fermion parity of the superconductor. The Majorana bound states further render the current finite at zero flux, nevertheless the resulting peculiar symmetry of the persistent current is compatible with a free energy that is even in time-reversal symmetry breaking fields. These unique features of the persistent currents are robust against disorder and provide unambiguous signatures of the presence of Majorana fermions.

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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