Thermoelectric transport in junctions of Majorana and Dirac channels
Abstract
We investigate the thermoelectric current and heat conductance in a chiral Josephson contact on a surface of a 3D topological insulator, covered with superconducting and magnetic insulator films. The contact consists of two junctions of Majorana and Dirac channels next to two superconductors. Geometric asymmetry results in a supercurrent without a phase bias. The interference of Dirac fermions causes oscillations of the electric and heat currents with an unconventional period as functions of the Aharonov-Bohm flux. Due to the gapless character of Majorana modes, there is no threshold for the thermoelectric effect and the current-flux relationship is non-sinusoidal. Depending on the magnetic flux, the direction of the electric current can be both from the hot to cold lead and vice versa.
Keywords
Cite
@article{arxiv.1611.09724,
title = {Thermoelectric transport in junctions of Majorana and Dirac channels},
author = {Dmitriy S. Shapiro and D. E. Feldman and Alexander D. Mirlin and Alexander Shnirman},
journal= {arXiv preprint arXiv:1611.09724},
year = {2017}
}
Comments
10 pages, 5 figures; minor changes, version accepted for publication in Physical Review B