Suppression of Superconductivity in Disordered Interacting Wires
Abstract
We study superconductivity suppression due to thermal fluctuations in disordered wires using the replica nonlinear σ-model (NLσM). We show that in addition to the thermal phase slips there is another type of fluctuations that result in a finite resistivity. These fluctuations are described by saddle points in NLσM and cannot be treated within the Ginzburg-Landau approach. The contribution of such fluctuations to the wire resistivity is evaluated with exponential accuracy. The magnetoresistance associated with this contribution is negative.
- Publication:
-
Physical Review Letters
- Pub Date:
- September 2006
- DOI:
- 10.1103/PhysRevLett.97.117001
- arXiv:
- arXiv:cond-mat/0604361
- Bibcode:
- 2006PhRvL..97k7001P
- Keywords:
-
- 74.78.Na;
- 73.21.Hb;
- 74.25.Fy;
- 74.40.+k;
- Mesoscopic and nanoscale systems;
- Quantum wires;
- Transport properties;
- Fluctuations;
- Condensed Matter - Superconductivity;
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 4 pages, 1 figure