Self-Consistent Two-Gap Description of MgB2 Superconductor
Ames Laboratory, Ames, IA 50011, USA
Department of Physics & Astronomy, Iowa State University, Ames, IA 50011, USA
Author to whom correspondence should be addressed.
Current address: Center for Nanophysics and Advanced Materials, University of Maryland, College Park, MD 20742, USA.
Current address: Department of Physics, University of California Davis, Davis, CA 95616, USA.
Received: 18 June 2019 / Revised: 14 July 2019 / Accepted: 2 August 2019 / Published: 6 August 2019
PDF [363 KB, uploaded 8 August 2019]
A self-consistent two-gap
-model is used to quantitatively describe several thermodynamic properties of MgB
superconductor. The superconducting coupling matrix,
, was obtained from the fitting of the superfluid density in the entire superconducting temperature range. Using this input, temperature-dependent superconducting gaps, specific heat, and upper critical fields were calculated with no adjustable parameters and compared with the experimental data as well as with the first-principles calculations. The observed agreement between fit and data shows that
-model provides adequate quantitative description of the two-gap superconductivity in MgB
and may serve as a relatively simple and versatile self-consistent description of the thermodynamic quantities in multi-gap superconductors.
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MDPI and ACS Style
Kim, H.; Cho, K.; Tanatar, M.A.; Taufour, V.; Kim, S.K.; Bud’ko, S.L.; Canfield, P.C.; Kogan, V.G.; Prozorov, R. Self-Consistent Two-Gap Description of MgB2 Superconductor. Symmetry 2019, 11, 1012.
Kim H, Cho K, Tanatar MA, Taufour V, Kim SK, Bud’ko SL, Canfield PC, Kogan VG, Prozorov R. Self-Consistent Two-Gap Description of MgB2 Superconductor. Symmetry. 2019; 11(8):1012.
Kim, Hyunsoo; Cho, Kyuil; Tanatar, Makariy A.; Taufour, Valentin; Kim, Stella K.; Bud’ko, Sergey L.; Canfield, Paul C.; Kogan, Vladimir G.; Prozorov, Ruslan. 2019. "Self-Consistent Two-Gap Description of MgB2 Superconductor." Symmetry 11, no. 8: 1012.
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