Specific heat jump of two-band superconductor KFe2As2 using Ginzburg-Landau theory

Askerzade İ.

MATERIALS SCIENCE-POLAND, cilt.32, sa.3, ss.465-469, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 32 Sayı: 3
  • Basım Tarihi: 2014
  • Doi Numarası: 10.2478/s13536-014-0212-2
  • Dergi Adı: MATERIALS SCIENCE-POLAND
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.465-469
  • Anahtar Kelimeler: Fe based superconductors, Ginzburg-Landau theory, specific heat jump, two-band superconductivity, LAYERED SUPERCONDUCTOR, IRON, TEMPERATURE, WAVE
  • Ankara Üniversitesi Adresli: Evet

Özet

In this study specific heat jump using two-gap Ginzburg-Landau (GL) theory has been calculated. In contrast to the previous approaches, we have taken into account intergradient order parameters interaction in the GL free energy functional. The thermodynamic magnetic field revealed nonlinear temperature dependence due to interband interaction between order parameters and their gradients. The calculations showed that the specific heat jump in two-order parameter superconductors was smaller than that of single-order parameter superconductors. It has been shown that such a model is in good agreement with experimental data for KFe2As2 superconductors.