Positive Seebeck Coefficient in Highly Doped La2−xSrxCuO4 (x = 0.33): Its Origin and Implication

Hao Jin*, Alessandro S Narduzzo, Minoru Nohara, Hidenori Takagi, Nigel E Hussey, Kamran Behnia

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

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
Number of pages4
JournalJournal of the Physical Society of Japan
Volume90
Issue number5
DOIs
Publication statusPublished - 15 May 2021

Bibliographical note

Funding Information:
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).

Funding Information:
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).

Publisher Copyright:
© 2021 The Physical Society of Japan.

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