(De)confinement of supercurrent in Z_2 Topological Insulators
Mesoscale and Nanoscale Physics
2010-07-13 v3 Superconductivity
High Energy Physics - Theory
Abstract
It is shown that the electric supercurrent flows in a Z_2 topological insulator with U_em(1) X U_z(1) (electromagnetic and spin) gauge symmetries. When U_z(1) is broken, a dissipationless electric current is still possible to flow locally but net charge transfer is absent, i.e., current is confined. In the Kane-Mele model for graphene, this confining-deconfining (superconducting) transition is driven by the Rashba spin-orbit interaction, which breaks U_z(1).
Cite
@article{arxiv.0905.2296,
title = {(De)confinement of supercurrent in Z_2 Topological Insulators},
author = {Jun Goryo and Nobuki Maeda and Ken-Ichiro Imura},
journal= {arXiv preprint arXiv:0905.2296},
year = {2010}
}
Comments
Reference [14] is added. Typos are corrected. Title is changed