s- and d-wave mixing in high-Tc superconductors

C. O’Donovan; J. P. Carbotte

doi:10.1103/PhysRevB.52.16208

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s- and d-wave mixing in high-Tc superconductors

C. O’Donovan, J. P. Carbotte

DOI 10.1103/PhysRevB.52.16208 · Physical Review B

T1

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Abstract

For a tight-binding model with nearest-neighbor attraction and a small orthorhombic distortion, we find a phase diagram for the gap at zero temperature which includes three distinct regions as a function of filling. In the first, the gap is a mixture of mainly d-wave with a smaller extended s-wave part. This is followed by a region in which there is a rapid and continuous increase in the s-wave part accompanied by a rapid increase in relative phase between s and d from 0 to π. Finally, there is a region of dominant s with a mixture of d and zero phase. In the mixed region with a finite phase, the s-wave part of the gap can show a sudden increase with decreasing temperature accompanied with a rapid increase in phase with an attendant change in superconducting properties.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Y1Ba2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown