Temperature dependence of critical currents of two-gap superconductors


Sahin H., Askerzade I. N.

EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS, cilt.36, ss.267-270, 2006 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 36 Konu: 3
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1051/epjap:2006123
  • Dergi Adı: EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS
  • Sayfa Sayıları: ss.267-270

Özet

In this paper, we consider the two-gap Ginzburg-Landau (G-L) free energy functional including the interactions, and obtain a very simple and explicit formula which presents the relation between the critical current density and temperature. The result shows that the temperature dependence of critical current density of a two-gap superconductor is of the form J(c) proportional to (T-c*- T)(1/2) at low temperatures and J(c) proportional to (T-c* - T)(3/2) near the critical temperature. Our critical current density expression is in accord with the previous theoretical work and experimental data.