Positive seebeck coefficient in highly doped La2-xSrxCuO4(x = 0.33); Its origin and implication

Hao Jin, Alessandro Narduzzo, Minoru Nohara, Hidenori Takagi, N. E. Hussey, Kamran Behnia

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    Abstract

    We present a study of the thermoelectric (Seebeck and Nernst) response in heavily overdoped, non-superconducting La1.67Sr0.33CuO4. In spite of the electron-like curvature of the Fermi surface, the Seebeck coefficient is positive at low temperatures. Such a feature, previously observed in copper, silver, gold and lithium, is caused by a non-trivial energy dependence of the scattering time. We argue that this feature implies a strong asymmetry between the lifetime of occupied and unoccupied states along the zone diagonals and such an electron-hole asymmetry impedes formation of Cooper pairs along the nodal direction in the superconducting ground state emerging at lower doping levels.

    Original languageEnglish
    Article number053702
    Journaljournal of the physical society of japan
    Volume90
    Issue number5
    DOIs
    Publication statusPublished - May 15 2021

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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