Majorana Zero Mode Detected with Spin Selective Andreev Reflection in the Vortex of a Topological Superconductor
Majorana Zero Mode Detected with Spin Selective Andreev Reflection in the Vortex of a Topological Superconductor
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拓扑超导体涡旋中自旋选择性安德烈夫反射检测马约拉纳零模式
DOI：
10.1103/physrevlett.116.257003
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发表时间：
2016-06-21
影响因子：
8.6
通讯作者：
Jia, Jin-Feng
中科院分区：
文献类型：
--
作者：
Sun, Hao-Hua;Zhang, Kai-Wen;Jia, Jin-Feng
最近，理论预测了马约拉纳零模（MZM）诱导自旋选择性安德烈耶夫反射（SSAR），一种新的磁性，可用于检测MZM。在这里，自旋极化扫描隧道显微镜或光谱已被应用于探测SSAR的MZM在拓扑超导体的Bi 2 Te 3/NbSe 2异质结构。当尖端极化和外部磁场相互平行而不是反平行时，观察到涡流中心处的隧穿微分电导的零偏置峰显著更高。这种自旋相关的隧穿效应提供了MZM的直接证据，并揭示了它除了零能模之外的磁性。我们的工作将刺激MZM对这些新物理性质的研究，因此，是对它们的统计和在量子计算中的应用进行实验研究的一步。
Recently, theory has predicted a Majorana zero mode (MZM) to induce spin selective Andreev reflection (SSAR), a novel magnetic property which can be used to detect the MZM. Here, spin-polarized scanning tunneling microscopy or spectroscopy has been applied to probe SSAR of MZMs in a topological superconductor of the Bi2Te3/NbSe2 heterostructure. The zero-bias peak of the tunneling differential conductance at the vortex center is observed substantially higher when the tip polarization and the external magnetic field are parallel rather than antiparallel to each other. This spin dependent tunneling effect provides direct evidence of MZM and reveals its magnetic property in addition to the zero energy modes. Our work will stimulate MZM research on these novel physical properties and, hence, is a step towards experimental study of their statistics and application in quantum computing.