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Antiferromagnetism and d-wave superconductivity in cuprates: a uster DMFT study

A. I. Lichtenstein·M. I. Katsnelson
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Abstract

We present a new approach to investigate the coexistence of antiferromagnetism and d-wave superconductivity in the two dimensional extended Hubbard model within a numerically exact cluster dynamical mean-field approximation. Self-consistent solutions with two non-zero order parameters exists in the wide range of doping level and temperatures. A linearized equation for energy spectrum near the Fermi level have been solved. The resulting d-wave gap has the correct magnitude and k-dependence but some distortion compare to the pure d_{x^2-y^2} superconducting order parameter due to the presence of underlying antiferromagnetic ordering.

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A. I. Lichtenstein, M. I. Katsnelson. 1999-11-20. Antiferromagnetism and d-wave superconductivity in cuprates: a uster DMFT study. https://doi.org/10.1103/physrevb.62.r9283

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