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

doi:10.7566/JPSJ.90.053702

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

School of Physics

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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 language	English
Article number	053702
Number of pages	4
Journal	Journal of the Physical Society of Japan
Volume	90
Issue number	5
DOIs	https://doi.org/10.7566/JPSJ.90.053702
Publication status	Published - 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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@article{be4d7aa89f06439c8f3f3e4edb136aba,

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

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 lowtemperatures. 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.",

author = "Hao Jin and Narduzzo, {Alessandro S} and Minoru Nohara and Hidenori Takagi and Hussey, {Nigel E} and Kamran Behnia",

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{\textquoteright}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: {\textcopyright} 2021 The Physical Society of Japan.",

year = "2021",

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doi = "10.7566/JPSJ.90.053702",

language = "English",

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T1 - Positive Seebeck Coefficient in Highly Doped La2−xSrxCuO4 (x = 0.33)

T2 - Its Origin and Implication

AU - Jin, Hao

AU - Narduzzo, Alessandro S

AU - Nohara, Minoru

AU - Takagi, Hidenori

AU - Hussey, Nigel E

AU - Behnia, Kamran

N1 - 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.

PY - 2021/5/15

Y1 - 2021/5/15

N2 - 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 lowtemperatures. 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.

AB - 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 lowtemperatures. 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.

U2 - 10.7566/JPSJ.90.053702

DO - 10.7566/JPSJ.90.053702

M3 - Article (Academic Journal)

SN - 0031-9015

VL - 90

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 5

M1 - 053702

ER -

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

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