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Spin-Pairing Correlations and Spin Polarization of Majorana Bound States in Two-Dimensional Topological Insulator Systems

Authors :
Kunhua Zhang
Junjie Zeng
Zhenhua Qiao
Yafei Ren
Publication Year :
2016
Publisher :
arXiv, 2016.

Abstract

We demonstrate that zero-energy Majorana bound state, in the ferromagnetic insulator (FI)-superconductor (SC) junction formed on the edge of two-dimensional topological insulator, exhibits three types of spin-triplet pairing correlations and its spin polarization direction is position independent in ferromagnetic insulator. When an electron is injected with a spin (anti-)parallel to this direction, equal-spin Andreev reflection exhibits the widest (narrowest) resonance peak. Similar behaviour is found when the coupling between two Majorana bound states in a FI-SC-FI junction is invoked, though an additional weak spin-singlet pairing correlation is generated. These signatures can readily facilitate the experimental detection of spin-triplet correlations and spin polarization of Majorana bound states.<br />Comment: 5 pages, 5 figures

Details

Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....c08928c823b12c388e87e077478daa43
Full Text :
https://doi.org/10.48550/arxiv.1612.09127