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Title: Quasiparticle mass enhancement approaching optimal doping in a high-T c superconductor

Abstract

In the quest for superconductors with higher transition temperatures (T c), one emerging motif is that electronic interactions favorable for superconductivity can be enhanced by fluctuations of a broken-symmetry phase. In recent experiments it is suggested that the existence of the requisite broken-symmetry phase in the high-T c cuprates, but the impact of such a phase on the ground-state electronic interactions has remained unclear. Here, we used magnetic fields exceeding 90 tesla to access the underlying metallic state of the cuprate YBa 2Cu 3O 6+δ over a wide range of doping, and observed magnetic quantum oscillations that reveal a strong enhancement of the quasiparticle effective mass toward optimal doping. Finally, this mass enhancement results from increasing electronic interactions approaching optimal doping, and suggests a quantum critical point at a hole doping of p crit ≈ 0.18.

Authors:
 [1];  [2];  [1];  [3];  [2];  [1];  [1];  [4];  [4];  [4];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of Cambridge (United Kingdom). Cavendish Lab.
  3. Univ. of British Columbia, Vancouver, BC (Canada). Dept. of Physics and Astronomy
  4. Univ. of British Columbia, Vancouver, BC (Canada). Dept. of Physics and Astronomy; Canadian Inst. for Advanced Research, Toronto (Canada)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1329588
Report Number(s):
LA-UR-15-22206
Journal ID: ISSN 0036-8075
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Science
Additional Journal Information:
Journal Volume: 348; Journal Issue: 6232; Journal ID: ISSN 0036-8075
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; High Magnetic Field Science

Citation Formats

Ramshaw, B. J., Sebastian, S. E., McDonald, R. D., Day, J., Tan, B. S., Zhu, Z., Betts, J. B., Liang, Ruixing, Bonn, D. A., Hardy, W. N., and Harrison, N. Quasiparticle mass enhancement approaching optimal doping in a high-Tc superconductor. United States: N. p., 2015. Web. doi:10.1126/science.aaa4990.
Ramshaw, B. J., Sebastian, S. E., McDonald, R. D., Day, J., Tan, B. S., Zhu, Z., Betts, J. B., Liang, Ruixing, Bonn, D. A., Hardy, W. N., & Harrison, N. Quasiparticle mass enhancement approaching optimal doping in a high-Tc superconductor. United States. doi:10.1126/science.aaa4990.
Ramshaw, B. J., Sebastian, S. E., McDonald, R. D., Day, J., Tan, B. S., Zhu, Z., Betts, J. B., Liang, Ruixing, Bonn, D. A., Hardy, W. N., and Harrison, N. Thu . "Quasiparticle mass enhancement approaching optimal doping in a high-Tc superconductor". United States. doi:10.1126/science.aaa4990. https://www.osti.gov/servlets/purl/1329588.
@article{osti_1329588,
title = {Quasiparticle mass enhancement approaching optimal doping in a high-Tc superconductor},
author = {Ramshaw, B. J. and Sebastian, S. E. and McDonald, R. D. and Day, J. and Tan, B. S. and Zhu, Z. and Betts, J. B. and Liang, Ruixing and Bonn, D. A. and Hardy, W. N. and Harrison, N.},
abstractNote = {In the quest for superconductors with higher transition temperatures (Tc), one emerging motif is that electronic interactions favorable for superconductivity can be enhanced by fluctuations of a broken-symmetry phase. In recent experiments it is suggested that the existence of the requisite broken-symmetry phase in the high-Tc cuprates, but the impact of such a phase on the ground-state electronic interactions has remained unclear. Here, we used magnetic fields exceeding 90 tesla to access the underlying metallic state of the cuprate YBa2Cu3O6+δ over a wide range of doping, and observed magnetic quantum oscillations that reveal a strong enhancement of the quasiparticle effective mass toward optimal doping. Finally, this mass enhancement results from increasing electronic interactions approaching optimal doping, and suggests a quantum critical point at a hole doping of pcrit ≈ 0.18.},
doi = {10.1126/science.aaa4990},
journal = {Science},
number = 6232,
volume = 348,
place = {United States},
year = {Thu Mar 26 00:00:00 EDT 2015},
month = {Thu Mar 26 00:00:00 EDT 2015}
}

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Cited by: 52 works
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