Effect of interlayer processes on the superconducting state within the t−J−U model: Full Gutzwiller wave-function solution and relation to experiment

Michał Zegrodnik; Józef Spałek

doi:10.1103/PhysRevB.95.024507

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Effect of interlayer processes on the superconducting state within the t−J−U model: Full Gutzwiller wave-function solution and relation to experiment

Michał Zegrodnik, Józef Spałek

DOI 10.1103/PhysRevB.95.024507 · Physical Review B

T1

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Abstract

The Gutzwiller wave-function solution of the t−J−U model is considered for the bilayer high-TC superconductor by using the so-called diagrammatic expansion method. The focus is on the influence of the interlayer effects on the superconducting state. The chosen pairing symmetry is a mixture of dx2−y2 symmetry within the layers and the so-called s± symmetry for the interlayer contribution. The analyzed interlayer terms reflect the interlayer electron hopping, the interlayer exchange coupling, and the interlayer pair hopping. The obtained results are compared with selected experimental data corresponding to the copper-based compound Bi-2212 with two Cu-O planes in the unit cell. For the sake of comparison, selected results for the case of the bilayer Hubbard model are also provided. This paper complements our recent results obtained for the single-plane high temperature cuprates [cf. J. Spałek, M. Zegrodnik, and J. Kaczmarczyk, Phys. Rev. B 95, 024506 (2017)].

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2212 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown