Probing Neutral Majorana Fermion Edge Modes with Charge Transport
Probing Neutral Majorana Fermion Edge Modes with Charge Transport
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DOI：
10.1103/physrevlett.102.216403
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发表时间：
2009-05-29
影响因子：
8.6
通讯作者：
Kane, C. L.
中科院分区：
文献类型：
--
作者：
Fu, Liang;Kane, C. L.
我们提出了两个实验来探测在超导体和沉积在拓扑绝缘体表面的磁体之间的结处发生的马约拉纳费米子边缘态。在磁畴壁上将两个马约拉纳费米子组合成单个狄拉克费米子，可以通过电荷传输来探测中性马约拉纳费米子。我们将讨论一种新型马约拉纳费米子干涉仪，用于探测其 Z(2) 相位。该装置还允许通过点接触测量中性马约拉纳费米子的传输。我们引入了由超导结形成的点接触，并表明其传输可以通过结上的相位差来控制。我们讨论了使用最近发现的拓扑绝缘体 Bi2Se3 进行这些实验的可行性。
We propose two experiments to probe the Majorana fermion edge states that occur at a junction between a superconductor and a magnet deposited on the surface of a topological insulator. Combining two Majorana fermions into a single Dirac fermion on a magnetic domain wall allows the neutral Majorana fermions to be probed with charge transport. We will discuss a novel interferometer for Majorana fermions, which probes their Z(2) phase. This setup also allows the transmission of neutral Majorana fermions through a point contact to be measured. We introduce a point contact formed by a superconducting junction and show that its transmission can be controlled by the phase difference across the junction. We discuss the feasibility of these experiments using the recently discovered topological insulator Bi2Se3.