Phonon softening in superconducting diamond

M. Hoesch, T. Fukuda, J. Mizuki, T. Takenouchi, Hiroshi Kawarada, J. P. Sutter, S. Tsutsui, A. Q R Baron, M. Nagao, Y. Takano

    Research output: Contribution to journalArticle

    28 Citations (Scopus)

    Abstract

    We observe strong softening of optical-phonon modes in superconducting (Tc =4.2 K) boron-doped diamond near the Brillouin-zone center using inelastic x-ray scattering from a chemical vapor deposition grown highly oriented sample. The magnitude of the softening, and our observation that it becomes stronger approaching zone center, supports theoretical models suggesting a phonon-mediated pairing mechanism via coupling of optical-phonon modes to Fermi surfaces around the zone center. The electron-phonon coupling parameter is determined as approximately λ=0.33.

    Original languageEnglish
    Article number140508
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume75
    Issue number14
    DOIs
    Publication statusPublished - 2007 Apr 18

    Fingerprint

    Diamond
    Boron
    Fermi surface
    softening
    Chemical vapor deposition
    Diamonds
    diamonds
    Scattering
    X rays
    Electrons
    x ray scattering
    Brillouin zones
    Fermi surfaces
    inelastic scattering
    boron
    vapor deposition
    electrons

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Hoesch, M., Fukuda, T., Mizuki, J., Takenouchi, T., Kawarada, H., Sutter, J. P., ... Takano, Y. (2007). Phonon softening in superconducting diamond. Physical Review B - Condensed Matter and Materials Physics, 75(14), [140508]. https://doi.org/10.1103/PhysRevB.75.140508

    Phonon softening in superconducting diamond. / Hoesch, M.; Fukuda, T.; Mizuki, J.; Takenouchi, T.; Kawarada, Hiroshi; Sutter, J. P.; Tsutsui, S.; Baron, A. Q R; Nagao, M.; Takano, Y.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 75, No. 14, 140508, 18.04.2007.

    Research output: Contribution to journalArticle

    Hoesch, M, Fukuda, T, Mizuki, J, Takenouchi, T, Kawarada, H, Sutter, JP, Tsutsui, S, Baron, AQR, Nagao, M & Takano, Y 2007, 'Phonon softening in superconducting diamond', Physical Review B - Condensed Matter and Materials Physics, vol. 75, no. 14, 140508. https://doi.org/10.1103/PhysRevB.75.140508
    Hoesch, M. ; Fukuda, T. ; Mizuki, J. ; Takenouchi, T. ; Kawarada, Hiroshi ; Sutter, J. P. ; Tsutsui, S. ; Baron, A. Q R ; Nagao, M. ; Takano, Y. / Phonon softening in superconducting diamond. In: Physical Review B - Condensed Matter and Materials Physics. 2007 ; Vol. 75, No. 14.
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    AU - Sutter, J. P.

    AU - Tsutsui, S.

    AU - Baron, A. Q R

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