Coexistence of antiferromagnetism and superconductivity in a mean-field theory of high-Tc superconductors

Masahiko Inui; Sebastian Doniach; Peter J. Hirschfeld; Andrei E. Ruckenstein

doi:10.1103/PhysRevB.37.2320

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Coexistence of antiferromagnetism and superconductivity in a mean-field theory of high-Tc superconductors

Masahiko Inui, Sebastian Doniach, Peter J. Hirschfeld, Andrei E. Ruckenstein

DOI 10.1103/PhysRevB.37.2320 · Physical Review B

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Abstract

We investigate a mean-field theory of the Hubbard model in the large on-site correlation limit, allowing for the possibility of a commensurate spin-density wave together with s- and d-wave-like superconductivity. As a function of t/U and band filling, the resulting phase diagram exhibits phases which are simultaneously superconducting and antiferromagnetic. We show that the superconducting order parameter goes to zero in the limit of a 1/2-filled Hubbard band. We comment on the possible relevance of these results to the newly discovered high-Tc superconductors.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2-xCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	40	Pressure not reported	unknown