Current-phase relation and h/e -periodic critical current of a chiral Josephson contact between one-dimensional Majorana modes
Current-phase relation and h/e -periodic critical current of a chiral Josephson contact between one-dimensional Majorana modes
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一维马约拉纳模式之间手性约瑟夫森接触的电流相位关系和 h/e 周期临界电流
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发表时间：
2015
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通讯作者：
A. Mirlin
中科院分区：
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作者：
D. S. Shapiro;A. Shnirman;A. Mirlin
我们探索了在导联中的一维（1D）电荷中性手性Majorana模式之间通过正常区域的带电狄拉克手性模式传输库珀对的长Josephson接触。我们研究了在三维拓扑绝缘体/超导体/磁体混合结构中实现的(i)透明接触和（ii）隧道结的机制。该装置作为一个SQUID，由法向区手性环包围的磁通量控制。这种手性导致临界电流的分数阶$h/e$周期模式。电流相关系可以具有锯齿状的形状，在不寻常的偶数相位$2ensuremath{pi}n$处有尖峰。
We explore a long Josephson contact transporting Cooper pairs between one-dimensional (1D) charge-neutral chiral Majorana modes in the leads via charged Dirac chiral modes in the normal region. We investigate the regimes of (i) transparent contacts and (ii) tunnel junctions implemented in 3D topological insulator/superconductor/magnet hybrid structures. The setup acts as a SQUID controlled by the magnetic flux enclosed by the chiral loop of the normal region. This chirality leads to the fractional $h/e$-periodic pattern of critical current. The current-phase relation can have sawtoothlike shape with spikes at unusual even phases of $2ensuremath{pi}n$.