Effective gap at microwave frequencies in MgB2 thin films with strong interband scattering

Physical Review B - Condensed Matter and Materials Physics

Volumn 71, Issue 21, 2005, Pages

  Ghigo, G ^b   Botta, D ^b   Chiodoni, A ^b   Gozzelino, L ^b   Gerbaldo, R ^b   Laviano, F ^b   Mezzetti, E ^b   Monticone, E ^a   Portesi, C ^a  

^a ISTITUTO ELETTROTECNICO NAZIONALE GALILEO FERRARIS   (Italy)

^b NONE

Author keywords

[No Author keywords available]

Indexed keywords

EID: 28244499860     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.71.214522     Document Type: Article

References (27)

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26. An alternative way to calculate the spectral functions is the approach of Choi [Nature (London) NATUAS 0028-0836 10.1038/nature00898 418, 758 (2002)]. By an iterative technique Choi obtain the full crystal momentum k and temperature dependence of the energy gap of MgB2 from first principles. However, since Choi do not give the band-integrated values of their coupling constants, it would be very complicated to use them in our model. The same holds for the spectral functions. The spectral functions and the coupling constants given by Golubov are easier to apply, since they are averaged over the Fermi surface.
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