DOI: https://doi.org/10.30970/jps.01.431
CROSSOVER FROM SUPERFLUIDITY TO SUPERCONDUCTIVITY IN 2D SYSTEMS AT INDIRECT INTERACTION BETWEEN CARRIERS
|
Journal of Physical Studies 1(3), 431–440 (1997)
DOI: https://doi.org/10.30970/jps.01.431 CROSSOVER FROM SUPERFLUIDITY TO SUPERCONDUCTIVITY IN 2D SYSTEMS AT INDIRECT INTERACTION BETWEEN CARRIERS |
|
V. Loktev*, V. Turkowski**, S. Sharapov*
*N. Bogolubov Institute for Theoretical Physics,
Ukrainian National Academy of Sciences
14b Metrolohichna Str., Kiev UA-252143, Ukraine
**Taras Shevchenko Kiev National University
6 Academician Hlushkov Av., Kiev UA-252127, Ukraine
Proceeding from the microscopic model Hamiltonian for the system of Fermi-particles interacting with phonons the equations for gap and chemical potential, admitting the analysis of its superconducting properties at arbitrary fermion concentration, are obtained. The solution of these equations allows to trace the crossover from local pair regime to Cooper pairing. It is shown that the type of superconducting behaviour depends not only on the strength of indirect interaction between fermions, but also on Fermi level position relatively to the maximal phonon energy.