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Письма в Журнал экспериментальной и теоретической физики, 2011, том 94, выпуск 3, страницы 240–245
(Mi jetpl1982)
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Эта публикация цитируется в 5 научных статьях (всего в 5 статьях)
КОНДЕНСИРОВАННОЕ СОСТОЯНИЕ
Crossovers between superconducting symmetry classes
V. A. Koziyab, M. A. Skvortsovab a Landau Institute for Theoretical Physics, Russian Academy of Sciences
b Moscow Institute of Physics and Technology
Аннотация:
We study the average density of states in a small metallic grain
coupled to two superconductors with the phase difference $\pi$,
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
$\sigma$-model we derive the exact expressions for the average density
of states in the crossovers between the symmetry classes A–C and CI–C.
Поступила в редакцию: 20.06.2011
Образец цитирования:
V. A. Koziy, M. A. Skvortsov, “Crossovers between superconducting symmetry classes”, Письма в ЖЭТФ, 94:3 (2011), 240–245; JETP Letters, 94:3 (2011), 222–227
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/jetpl1982 https://www.mathnet.ru/rus/jetpl/v94/i3/p240
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