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

Feliciano Giustino, Marvin L. Cohen and Steven G. Louie ()
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Feliciano Giustino: University of California at Berkeley
Marvin L. Cohen: University of California at Berkeley
Steven G. Louie: University of California at Berkeley

Nature, 2008, vol. 452, issue 7190, 975-978

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.

Date: 2008
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DOI: 10.1038/nature06874

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