期刊
JOURNAL OF SUPERCONDUCTIVITY
卷 16, 期 2, 页码 319-321出版社
KLUWER ACADEMIC/PLENUM PUBL
DOI: 10.1023/A:1023613419619
关键词
level statistics; disordered superconductors
We study level statistics in physical systems consisting of noninteracting quasiparticles in disordered 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.
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