Griffiths phase in the thermal quantum Hall effect
Mesoscale and Nanoscale Physics
2009-11-11 v1 Disordered Systems and Neural Networks
Abstract
Two dimensional disordered superconductors with broken spin-rotation and time-reversal invariance, e.g. with p_x+ip_y pairing, can exhibit plateaus in the thermal Hall coefficient (the thermal quantum Hall effect). Our numerical simulations show that the Hall insulating regions of the phase diagram can support a sub-phase where the quasiparticle density of states is divergent at zero energy, \rho(E)\sim |E|^{1/z-1}, with a non-universal exponent , due to the effects of rare configurations of disorder (``Griffiths phase'').
Cite
@article{arxiv.cond-mat/0503679,
title = {Griffiths phase in the thermal quantum Hall effect},
author = {A. Mildenberger and F. Evers and R. Narayanan and A. D. Mirlin and K. Damle},
journal= {arXiv preprint arXiv:cond-mat/0503679},
year = {2009}
}
Comments
4+ pages, 5 figures