Positive Seebeck Coefficient in Highly Doped La_(2−x) Sr_x CuO_4 (x = 0.33); Its Origin and Implication

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

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9 Citations (SciVal)

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
Pages (from-to)053702
JournalJournal of the Physical Society of Japan
Volume90
Issue number5
Early online date9 Apr 2021
DOIs
Publication statusPublished - 15 May 2021

Funding

Acknowledgments KB is supported by the Agence Nationale de la Recherche (ANR-18-CE92-0020-01; ANR-19-CE30-0014-04). NEH is supported by the Netherlands Organisation for Scientific Research (NWO) (Grant No. 16METL01) —“Strange Metals” and by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement No. 835279-Catch-22). KB is supported by the Agence Nationale de la Recherche (ANR-18-CE92-0020-01; ANR-19-CE30-0014-04). NEH is supported by the Netherlands Organisation for Scientific Research (NWO) (Grant No. 16METL01)-"Strange Metals" and by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (Grant Agreement No. 835279-Catch-22).

FundersFunder number
Horizon 2020 Framework Programme835279
European Research Council
French National Research AgencyANR-18-CE92-0020-01, ANR-19-CE30-0014-04
Nederlandse Organisatie voor Wetenschappelijk Onderzoek16METL01
Horizon 2020

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