Phase transition from a dx2−y2 to a dx2−y2+dxy superconductor

Angsula Ghosh; Sadhan K. Adhikari

doi:10.1103/PhysRevB.60.10401

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Phase transition from a dx2−y2 to a dx2−y2+dxy superconductor

Angsula Ghosh, Sadhan K. Adhikari

DOI 10.1103/PhysRevB.60.10401 · Physical Review B

T1

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Abstract

We study the phase transition from a dx2−y2 to a dx2−y2+dxy superconductor using the tight-binding model of two-dimensional cuprates. As the temperature is lowered past the critical temperature Tc, first a dx2−y2 superconducting phase is created. With further reduction of temperature, the dx2−y2+dxy phase is created at temperature T=Tc1. We study the temperature dependencies of the order parameter, specific heat, and spin susceptibility in these mixed-angular-momentum states on a square lattice and on a lattice with orthorhombic distortion. The above-mentioned phase transitions are identified by two jumps in specific heat at Tc and Tc1.

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
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown