Thermal metal-insulator transition in a helical topological superconductor

  title={Thermal metal-insulator transition in a helical topological superconductor},
  author={Ion Cosma Fulga and A. Akhmerov and Jakub Tworzydło and Benjamin B'eri and C. W. J. Beenakker},
  journal={Physical Review B},
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… 

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