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Small phonon contribution to the photoemission kink in the copper oxide superconductors

Author

Listed:
  • Feliciano Giustino

    (University of California at Berkeley
    Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA)

  • Marvin L. Cohen

    (University of California at Berkeley
    Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA)

  • Steven G. Louie

    (University of California at Berkeley
    Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA)

Abstract

This paper reports first-principles calculations of the role of phonons in La2−xSrxCuO4 (LSCO). It is demonstrated that the phonon-induced renormalization of the electron energies and the Fermi velocity is almost one order of magnitude smaller than the effect observed in photoemission experiments. Therefore the present finding rules out electron–phonon interaction in bulk LSCO as the exclusive origin of the measured kink.

Suggested Citation

  • Feliciano Giustino & Marvin L. Cohen & Steven G. Louie, 2008. "Small phonon contribution to the photoemission kink in the copper oxide superconductors," Nature, Nature, vol. 452(7190), pages 975-978, April.
    • Handle: RePEc:nat:nature:v:452:y:2008:i:7190:d:10.1038_nature06874
    DOI: 10.1038/nature06874
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