Thermal metal-insulator transition in a helical topological superconductor
Mesoscale and Nanoscale Physics
2012-08-07 v1
Abstract
Two-dimensional superconductors with time-reversal symmetry have a Z_2 topological invariant, that distinguishes phases with and without helical Majorana edge states. We study the topological phase transition in a class-DIII network model, and show that it is associated with a metal-insulator transition for the thermal conductance of the helical superconductor. The localization length diverges at the transition with critical exponent nu approx 2.0, about twice the known value in a chiral superconductor.
Keywords
Cite
@article{arxiv.1205.1441,
title = {Thermal metal-insulator transition in a helical topological superconductor},
author = {I. C. Fulga and A. R. Akhmerov and J. Tworzydło and B. Béri and C. W. J. Beenakker},
journal= {arXiv preprint arXiv:1205.1441},
year = {2012}
}
Comments
9 pages, 8 figures, 3 tables