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28 March 2024
 
  » pubmed » pmid12689237

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Phonon dispersion and lifetimes in MgB2
Abhay Shukla ; Matteo Calandra ; Matteo D’Astuto ; Michele Lazzeri ; Francesco Mauri ; Christophe Bellin ; Michael Krisch ; J Karpinski ; S M Kazakov ; J Jun ; D Daghero ; K Parlinski ;
Date 7 Mar 2003
Journal Phys Rev Lett, 90 (9), 095506
AbstractWe measure phonon dispersion and linewidth in a single crystal of MgB2 along the Gamma-A, Gamma-M, and A-L directions using inelastic x-ray scattering. We use density functional theory to compute the effect of both electron-phonon coupling and anharmonicity on the linewidth, obtaining excellent agreement with experiment. Anomalous broadening of the E(2g) phonon mode is found all along Gamma-A. The dominant contribution to the linewidth is always the electron-phonon coupling.
Source PubMed, pmid12689237
Other source [GID 408426] cond-mat/0209064
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