Angular Dependence of the Critical Current Density in Two-Band Ginzburg-Landau Theory

Askerzade İ., Guzel M. S.

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, cilt.32, sa.7, ss.1921-1926, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 32 Sayı: 7
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1007/s10948-018-4933-z
  • Dergi Adı: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1921-1926
  • Anahtar Kelimeler: Critical current, Angular dependence, Two-band superconductor, Ginzburg-Landau theory, UPPER CRITICAL-FIELD, LAYERED SUPERCONDUCTOR
  • Ankara Üniversitesi Adresli: Evet

Özet

In this study, we have calculated the angular dependence of critical current using the two-band Ginzburg-Landau (GL) theory, generalized for the anisotropic mass case in different bands. It was illustrated that the two-band GL theory gives analytical expression for the angular dependence of critical current density. In calculations, we employ results of microscopical simulations for Fermi surface of LaFeAsO1-xFx compound. It is shown that such a theory is in agreement with the experimental data for this compound. The obtained result was discussed in comparison with other studies which take into account pinning effects.