New Universality Class at the Superconductor--Insulator Transition
Preprint
- 24 August 1996
Abstract
We study dynamic properties of thin films near the superconductor - insulator transition. We formulate the problem in a phase representation. The key new feature of our model is the assumption of a {\it local} ohmic dissipative mechanism. Coarse graining leads to a Ginzburg-Landau description, with non-ohmic dynamics for the order parameter. For strong enough damping a new universality class is observed. It is characterized by a {\it non-universal} d.c. conductivity, and a damping dependent dynamical critical exponent. The formulation also provides a description of the magnetic field-tuned transition. Several microscopic mechanisms are proposed as the origin of the dissipation.Keywords
All Related Versions
- Version 1, 1996-08-24, ArXiv
- Published version: Physical Review Letters, 78 (9), 1779.
This publication has 0 references indexed in Scilit: