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          Institute: MPI für Festkörperforschung     Collection: FKF Publikationen 2002     Display Documents



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ID: 7376.0, MPI für Festkörperforschung / FKF Publikationen 2002
Specific heat of MgB2 in a one- and a two-band model from first-principles calculations
Authors:Golubov, A. A.; Kortus, J.; Dolgov, O. V.; Jepsen, O.; Kong, Y.; Andersen, O. K.; Gibson, B. J.; Ahn, K.; Kremer, R. K.
Language:English
Date of Publication (YYYY-MM-DD):2002
Title of Journal:Journal of Physics: Condensed Matter
Volume:14
Issue / Number:6
Start Page:1353
End Page:1360
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:The heat capacity anomaly at the transition to
superconductivity of the layered superconductor MgB2 is
compared to first-principles calculations with the Coulomb
repulsion, mu*, as the only parameter which is fixed to give
the measured T-c. We solve the Eliashberg equations for both an
isotropic one-band model and a two-band model with different
superconducting gaps on the pi-band and sigma-band Fermi
surfaces. The agreement with experiments is considerably better
for the two-band model than for the one-band model.
External Publication Status:published
Document Type:Article
Communicated by:Michaela Asen-Palmer
Affiliations:MPI für Festkörperforschung
External Affiliations:; Univ Twente, Dept Appl Phys, POB 217, NL-7500 AE Enschede, Netherlands
; Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
Identifiers:ISI:000174332000027
ISSN:0953-8984
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