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Pseudogap suppression by competition with superconductivity in La-based cuprates


Küspert, J; Cohn Wagner, R; Lin, C; von Arx, K; Wang, Q; Kramer, K; Pudelko, W R; Plumb, N C; Matt, C E; Fatuzzo, C G; Sutter, D; Sassa, Y; Yan, J-Q; Zhou, J-S; Goodenough, J B; Pyon, S; Takayama, T; Takagi, H; Kurosawa, T; Momono, N; Oda, M; Hoesch, M; Cacho, C; Kim, T K; Horio, M; Chang, J (2022). Pseudogap suppression by competition with superconductivity in La-based cuprates. Physical review research, 4(4):043015.

Abstract

We carried out a comprehensive high-resolution angle-resolved photoemission spectroscopy (ARPES) study of the pseudogap interplay with superconductivity in La-based cuprates. The three systems La2−xSrxCuO4, La1.6−xNd0.4SrxCuO4, and La1.8−xEu0.2SrxCuO4 display slightly different pseudogap critical points in the temperature versus doping phase diagram. We studied the pseudogap evolution into the superconducting state for doping concentrations just below the critical point. In this setting, near optimal doping for superconductivity and in the presence of the weakest possible pseudogap, we uncover how the pseudogap is partially suppressed inside the superconducting state. This conclusion is based on the direct observation of a reduced pseudogap energy scale and re-emergence of spectral weight suppressed by the pseudogap. Altogether these observations suggest that the pseudogap phenomenon in La-based cuprates is in competition with superconductivity for antinodal spectral weight.

Abstract

We carried out a comprehensive high-resolution angle-resolved photoemission spectroscopy (ARPES) study of the pseudogap interplay with superconductivity in La-based cuprates. The three systems La2−xSrxCuO4, La1.6−xNd0.4SrxCuO4, and La1.8−xEu0.2SrxCuO4 display slightly different pseudogap critical points in the temperature versus doping phase diagram. We studied the pseudogap evolution into the superconducting state for doping concentrations just below the critical point. In this setting, near optimal doping for superconductivity and in the presence of the weakest possible pseudogap, we uncover how the pseudogap is partially suppressed inside the superconducting state. This conclusion is based on the direct observation of a reduced pseudogap energy scale and re-emergence of spectral weight suppressed by the pseudogap. Altogether these observations suggest that the pseudogap phenomenon in La-based cuprates is in competition with superconductivity for antinodal spectral weight.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Uncontrolled Keywords:General Physics and Astronomy
Language:English
Date:10 October 2022
Deposited On:19 Oct 2022 14:26
Last Modified:27 Jun 2024 01:40
Publisher:American Physical Society
ISSN:2643-1564
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1103/physrevresearch.4.043015
Project Information:
  • : FunderSNSF
  • : Grant ID200021_188564
  • : Project TitleInterdisciplinary Approach to Unconventional Superconductivity
  • : FunderSNSF
  • : Grant ID200021_185037
  • : Project TitleAngle-resolved photoemission studies of bismuth oxide superconductors
  • : FunderWenner-Gren Foundation
  • : Grant ID
  • : Project Title
  • Content: Published Version
  • Language: English
  • Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)