Upper critical magnetic field for antiferromagnetically correlated d-wave superconductors

A. Pérez-González; R. A. Brito-Orta

doi:10.1103/PhysRevB.64.214502

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Upper critical magnetic field for antiferromagnetically correlated d-wave superconductors

A. Pérez-González, R. A. Brito-Orta

DOI 10.1103/PhysRevB.64.214502 · Physical Review B

T1

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Abstract

We have obtained strong-coupling equations for the superconducting gap of a two-dimensional d-wave superconductor subjected to a perpendicular external magnetic field. The superconductor is described as a nearly antiferromagnetic Fermi liquid with pairing between the planar quasiparticles due to the exchange of antiferromagnetic spin fluctuations. We solve the equations numerically to find the upper-critical magnetic field as a function of temperature assuming that the pairing interaction mirrors the wave-vector and frequency dependence of the phenomenological dynamic spin susceptibility proposed by Millis, Monien, and Pines for the high-Tc superconducting cuprates. A single tight-binding energy band with first- and second-nearest-neighbor hopping is considered. One parameter in the energy-dispersion relation allows for anisotropy between the a and b directions and, consequently, for the possibility of considering a mixture of s- and d-wave gaps. We show results for different sets of parameters.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Tl2Ba2CuO6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CuOy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O6x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2-xLaxCuO6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown