Physics – Condensed Matter – Superconductivity
Scientific paper
2009-10-17
Journal Izvestiya VUZov. Pish. Tech.; Krasnodar, 2008; 7 p., bibl. 3.; Rus.; Published in VINITI RAN 05.11.2008, N 862 B2008
Physics
Condensed Matter
Superconductivity
8 pages, 0 figures
Scientific paper
Langevin forces are investigated in the framework of the phenomenological Ginzburg-Landau (GL) theory. These stochastic forces introducted in the time-dependent Ginzburg-Landau (TDGL) equation describing the superconductor transport properties above the critical temperature model the fluctuations action. We assume that there exists a profound connection between the fluctuation Cooper pair energy spectrum and the Langevin forces possible values spectrum. In investigation carried out on the basis of that hypothesis we obtain the analytical expression for Langevin forces defining them by means of order parameter, i.e., by means of the fluctuation Cooper pair wave function. Langevin forces properties are analyzed. The conlusion about their complex nature is done. Asymptotic analysis of Langevin forces is performed.
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