For authors
Submission status

Archive (English)
      Volume 105
      Volume 104
      Volume 103
      Volume 102
      Volume 101
      Volume 100
      Volume 99
      Volume 98
      Volume 97
      Volume 96
      Volume 95
      Volume 94
      Volume 93
VOLUME 94 | ISSUE 3 | PAGE 240
Crossovers between superconducting symmetry classes
V. A. Koziy, M. A. Skvortsov
L.D. Landau Institute for Theoretical Physics, 142432 Chernogolovka, Russia
Moscow Institute of Physics and Technology, 141700 Moscow, Russia

We study the average density of states in a small metallic grain coupled to two superconductors with the phase difference π, in a magnetic field. The spectrum of the low-energy excitations in the grain is described by the random matrix theory whose symmetry depends on the magnetic field strength and coupling to the superconductors. In the limiting cases, a pure superconducting symmetry class is realized. For intermediate magnetic fields or couplings to the superconductors, the system experiences a crossover between different symmetry classes. With the help of the supersymmetric σ-model we derive the exact expressions for the average density of states in the crossovers between the symmetry classes A-C and CI-C.

Download PS file (GZipped, 181K)  |  Download PDF file (248.1K)

Список работ, цитирующих данную статью, см. здесь.

List of articles citing this article can be found here.