Superconducting Quantum Critical Point
Condensed Matter
2009-10-30 v2
Abstract
We study the properties of a quantum critical point which develops in a BCS superconductor when pair-breaking suppresses the transition temperature to zero. The pair fluctuations are characterized by a dynamical critical exponent z=2. Except for very low temperatures, anomalous contribution to the conductivity is proportional to the square root of T in three dimensions, but to 1/T in two dimensions. At lowest temperatures, the conductivity correction varies as T to the power 1/4 in three dimensions, and as ln(1/T) in two.
Cite
@article{arxiv.cond-mat/9710351,
title = {Superconducting Quantum Critical Point},
author = {Revaz Ramazashvili and Piers COleman},
journal= {arXiv preprint arXiv:cond-mat/9710351},
year = {2009}
}
Comments
3 pages, 3 Postscript figures, Latex