Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/4376
Title: Superconducting properties of MgB2 from first principles
Authors: Floris, A. 
Sanna, A. 
Lüders, M. 
Profeta, G. 
Lathiotakis, N. N. 
Marques, M. A. L. 
Franchini, C. 
Gross, E. K. U. 
Continenza, A. 
Massidda, S. 
Keywords: Superconductivity
Issue Date: 2007
Citation: Physica C: Superconductivity. 456:1-2 (2007) 45-53
Abstract: The discovery of superconductivity in MgB2, with a rather high transition temperature, has triggered a large number of theoretical and experimental investigations on important issues such as, e.g., the role of gap anisotropy over the Fermi surface (multi-gap superconductivity). We report here the results obtained in this compound using the density functional theory for superconductors, recently proposed by the authors. Without invoking any adjustable parameters, such as [mu]*, we obtain the transition temperature, the gaps, and the specific heat in very good agreement with experiment. Moreover, our calculations allow for a detailed study of how the phonon-mediated attraction and Coulomb repulsion act differently on [sigma] and [pi] states, thereby stabilizing the observed superconducting phase.
URI: https://hdl.handle.net/10316/4376
DOI: 10.1103/PhysRevLett.94.037004
Rights: openAccess
Appears in Collections:FCTUC Física - Artigos em Revistas Internacionais

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