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Title: Raman evidence for nonadiabatic effects in optical phonon self-energies of transition metals
Authors: Ponosov, Y. S.
Streltsov, S. V.
Issue Date: 2016
Publisher: American Physical Society
Citation: Ponosov Y. S. Raman evidence for nonadiabatic effects in optical phonon self-energies of transition metals / Y. S. Ponosov, S. V. Streltsov. — DOI 10.1103/PhysRevB.94.214302 // Physical Review B. — 2016. — Vol. 94. — Iss. 21. — 214302.
Abstract: We report a Raman study of the effect of temperature on the self-energies of optical phonons in a number of transition metals with hexagonal-close-packed structure. Anisotropic softening of phonon energies and narrowing of phonon linewidths with increasing temperature are observed. These effects are reproduced in the calculations of phonon spectral functions based on ab initio electronic structures and with carrier scattering by phonons taken into account. The combined observations and results of simulations indicate a relation between observed anomalies and the renormalization of the electron spectrum due to electron-phonon interaction. It is emphasized that the temperature dependence of the phonon energies resembles anharmonic behavior but is actually an electron-induced effect. © 2016 American Physical Society.
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85006504101
PURE ID: 1381160
ISSN: 24699950
DOI: 10.1103/PhysRevB.94.214302
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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