Manipulation of the Majorana Fermion, Andreev Reflection, and Josephson Current on Topological Insulators

作者：Tanaka Yukio^*; Yokoyama Takehito; Nagaosa Naoto

来源：Physical Review Letters, 2009, 103(10): 107002.

DOI：10.1103/PhysRevLett.103.107002

We study theoretically the transport properties of a normal metal (N)/ferromagnet insulator (FI)/superconductor (S) junction and a S/FI/S junction formed on the surface of a three-dimensional topological insulator, where the chiral Majorana mode exists at the FI/S interface. We find the chiral Majorana mode generated in N/FI/S and S/FI/S junctions is very sensitively controlled by the direction of the magnetization m in the FI region. In particular, the current-phase relation of the Josephson current in S/FI/S junctions has a phase shift of neither 0 nor pi that can be tuned continuously by the component of m perpendicular to the interface.

• 出版日期2009-9-4