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Contribution of inter- and intraband transitions into electron-phonon coupling in metals

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    0545327 - FZÚ 2022 RIV US eng J - Journal Article
    Medvedev, Nikita - Milov, I.
    Contribution of inter- and intraband transitions into electron-phonon coupling in metals.
    European Physical Journal D. Roč. 75, č. 7 (2021), č. článku 212. ISSN 1434-6060. E-ISSN 1434-6079
    R&D Projects: GA MŠk LTT17015
    EU Projects: European Commission(XE) 654148 - LASERLAB-EUROPE
    Research Infrastructure: e-INFRA CZ - 90140
    Institutional support: RVO:68378271
    Keywords : electron-photon coupling in metals * inter- and intraband transitions * calculations
    OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
    Impact factor: 1.611, year: 2021
    Method of publishing: Open access

    We recently developed an approach for calculation of the electron–phonon (electron–ion in a more general case) coupling in materials based on tight-binding molecular dynamics simulations. In the present work, we utilize this approach to study partial contributions of inter- and intraband electron scattering events into total electron–phonon coupling in Al, Au, and Cu elemental metals and in AlCu alloy. We demonstrate that the interband scattering plays an important role in the electron–ion energy exchange process in Al and AlCu, whereas intraband d–d transitions are dominant in Au and Cu. Moreover, interand intraband transitions exhibit qualitatively different dependencies on the electron temperature. Our findings should be taken into account for the interpretation of experimental results on the electron–phonon coupling parameter.

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