Abstract
We study level statistics in physical systems consisting of noninteracting quasiparticles in dis-ordered superconductors that have neither time-reversal nor spin-rotation invariance. These systems are representatives of class D within the recent classification scheme of random matrix ensembles (RME). Different phase diagrams are exposed, which strongly depend on specific models of disorder. In the metallic regime the nearest neighbor spacing distribution P(s) in different models reproduces (with high accuracy) the Wigner surmise for the Gaussian unitary ensemble (GUE) expected in the presence of magnetic field whereas in the localized regime level repulsion is suppressed, reflecting only "basic" symmetries of the system and ignoring particle-hole symmetries.
Original language | English |
---|---|
Pages (from-to) | 319-321 |
Number of pages | 3 |
Journal | Journal of Superconductivity and Novel Magnetism |
Volume | 16 |
Issue number | 2 |
State | Published - 1 Dec 2003 |
Keywords
- Disordered superconductors
- Level statistics
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics