Superconductivity and the Pseudogap in the Two-Dimensional Hubbard Model

Emanuel Gull, Olivier Parcollet, and Andrew J. Millis
Phys. Rev. Lett. 110, 216405 – Published 22 May 2013
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Abstract

Recently developed numerical methods have enabled the explicit construction of the superconducting state of the Hubbard model of strongly correlated electrons in parameter regimes where the model also exhibits a pseudogap and a Mott insulating phase. dx2y2 symmetry superconductivity is found to occur in proximity to the Mott insulator, but separated from it by a pseudogapped nonsuperconducting phase. The superconducting transition temperature and order parameter amplitude are found to be maximal at the onset of the normal-state pseudogap. The emergence of superconductivity from the normal state pseudogap leads to a decrease in the excitation gap. All of these features are consistent with the observed behavior of the copper-oxide superconductors.

  • Received 31 August 2012

DOI:https://doi.org/10.1103/PhysRevLett.110.216405

© 2013 American Physical Society

Authors & Affiliations

Emanuel Gull1,2, Olivier Parcollet3, and Andrew J. Millis4

  • 1Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
  • 2Max Planck Institute for the Physics of Complex Systems, Dresden, Dresden 01187, Germany
  • 3Institut de Physique Théorique, CEA, IPhT, CNRS, URA 2306, F-91191 Gif-sur-Yvette, France
  • 4Department of Physics, Columbia University, New York, New York 10027, USA

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Issue

Vol. 110, Iss. 21 — 24 May 2013

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