Selective Equal-Spin Andreev Reflections Induced by Majorana Fermions
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He-2014-Selective Equal-Spin.pdf
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Author(s)
He, James J.
Ng, Tai-Kai
Lee, Patrick A.
Law, Kam Tuen
Date Issued
January 2014
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
He, James J., T. K. Ng, Patrick A. Lee, and K. T. Law. “Selective Equal-Spin Andreev Reflections Induced by Majorana Fermions.” Physical Review Letters 112, no. 3 (January 2014). © 2014 American Physical Society
Version
Final published version
Abstract
In this work, we find that Majorana fermions induce selective equal spin Andreev reflections (SESARs), in which incoming electrons with certain spin polarization in the lead are reflected as counterpropagating holes with the same spin. The spin polarization direction of the electrons of this Andreev reflected channel is selected by the Majorana fermions. Moreover, electrons with opposite spin polarization are always reflected as electrons with unchanged spin. As a result, the charge current in the lead is spin polarized. Therefore, a topological superconductor which supports Majorana fermions can be used as a novel device to create fully spin-polarized currents in paramagnetic leads. We point out that SESARs can also be used to detect Majorana fermions in topological superconductors.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.112.037001
