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  • Open Access

Overdoped end of the cuprate phase diagram

Thomas A. Maier1,2, Seher Karakuzu2, and Douglas J. Scalapino3

  • 1Computational Sciences and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6164, USA
  • 2Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6164, USA
  • 3Department of Physics, University of California, Santa Barbara, California 93106-9530, USA

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Phys. Rev. Research 2, 033132 – Published 23 July, 2020

DOI: https://doi.org/10.1103/PhysRevResearch.2.033132

Abstract

Studying the disappearance of superconductivity at the end of the overdoped region of the cuprate phase diagram offers a different approach for investigating the interaction which is responsible for pairing in these materials. In the underdoped region this question is complicated by the presence of charge and stripe ordered phases as well as the pseudogap. In the overdoped region the situation appears simpler with only a normal phase, a superconducting phase, and impurity scattering. Here, for the overdoped region, we report the results of a combined dynamic cluster approximation (DCA) and a weak Born impurity scattering calculation for a t−t′−U Hubbard model. We find that a decrease in the d-wave pairing strength of the two-particle scattering vertex is closely coupled to changes in the momentum and frequency structure of the magnetic spin fluctuations as the system is overdoped. Treating the impurity scattering within a disordered BCS d-wave approximation, we see how the combined effects of the decreasing d-wave pairing strength and weak impurity scattering lead to the end of the Tc dome.

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References (25)

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Outline

Information

Phys. Rev. Research 2, 033132– Published 23 July, 2020
  • Received 24 April 2020
  • Revised 30 June 2020
  • Accepted 2 July 2020
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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