Coexistence of superconductivity and antiferromagnetism in the Hubbard model for cuprates

A. Foley, S. Verret, A.-M. S. Tremblay, and D. Sénéchal
Phys. Rev. B 99, 184510 – Published 21 May 2019
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Abstract

Antiferromagnetism and d-wave superconductivity are the most important competing ground-state phases of cuprate superconductors. Using cellular dynamical mean-field theory for the Hubbard model, we revisit the question of the coexistence and competition of these phases in the one-band Hubbard model with realistic band parameters and interaction strengths. With an exact diagonalization solver, we improve on previous works with a more complete bath parametrization which is carefully chosen to grant the maximal possible freedom to the hybridization function for a given number of bath orbitals. Compared with previous incomplete parametrizations, this general bath parametrization shows that the range of microscopic coexistence of superconductivity and antiferromagnetism is reduced for band parameters for Nd2xCexCuO4 (NCCO) and confined to electron doping with parameters relevant for YBa2Cu3O7x (YBCO).

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  • Received 28 November 2018
  • Revised 25 March 2019

DOI:https://doi.org/10.1103/PhysRevB.99.184510

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

A. Foley1, S. Verret1, A.-M. S. Tremblay1,2, and D. Sénéchal1

  • 1Département de physique and Institut quantique, Université de Sherbrooke, Sherbrooke, Québec, Canada J1K 2R1
  • 2Canadian Institute for Advanced Research, Toronto, Ontario, Canada M5G 1Z8

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Issue

Vol. 99, Iss. 18 — 1 May 2019

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