Superconductivity within the t−t′ Hubbard model of a bilayer

J. Mráz; R. Hlubina

doi:10.1103/PhysRevB.70.144529

← Back to search

Superconductivity within the t−t′ Hubbard model of a bilayer

J. Mráz, R. Hlubina

DOI 10.1103/PhysRevB.70.144529 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

Making use of a variational approach to Kohn-Luttinger superconductivity, we study the superconducting state of two coupled CuO2 planes. The bilayer is described in terms of a t−t′ Hubbard model with weak interplane hopping. For parameters relevant to overdoped cuprates, we find a substantial increase of the mean field transition temperature Tc, when compared with the single layer model. This increase is driven by the enhanced density of states of the bilayer.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Tl2201 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
Bi2212 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Tl2Ba2Can-1CunO2n+4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	unknown
HgBa2Can-1CunO2n+2+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	95	Pressure not reported	unknown