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Phonon dispersion and lifetimes in MgB2. | LitMetric

Phonon dispersion and lifetimes in MgB2.

Phys Rev Lett

Laboratoire de Minéralogie-Cristallographie, case 115, 4 Place Jussieu, 75252, Paris cedex 05, France.

Published: March 2003

AI Article Synopsis

Article Abstract

We 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.

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http://dx.doi.org/10.1103/PhysRevLett.90.095506DOI Listing

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