Angular dependence of upper critical field in two-band Ginzburg-Landau theory

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Askerzade İ., Tanatar B.

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, cilt.459, sa.1-2, ss.56-61, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 459 Sayı: 1-2
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1016/j.physc.2007.04.218
  • Dergi Adı: PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.56-61
  • Anahtar Kelimeler: two-band superconductivity, angular dependence, upper critical field, mass anisotropy, LOW-TEMPERATURE ANOMALIES, MGB2, SUPERCONDUCTIVITY, ANISOTROPY, YNI2B2C, H-C2, HEAT, GAPS
  • Ankara Üniversitesi Adresli: Hayır

Özet

Generalization of two-band Ginzburg-Landau (GL) theory to the case of anisotropic mass is presented. The temperature dependence of the anisotropy parameter of upper critical field gamma(c2)(T) = H-c2(parallel to)(T)/H-c2(perpendicular to)(T) and angular dependence of H-c2(theta,T) are calculated using anisotropic mass two-band Ginzburg-Landau theory of superconductors. It is shown that, with decreasing temperature anisotropy parameter gamma(c2)(T) is increased. Results of our calculations are in agreement with experimental data for single crystal MgB2. (C) 2007 Published by Elsevier B.V.