Mixing of superconducting $d_{x^2-y^2}$ state with s-wave states for different filling and temperature

Angsula Ghosh; Sadhan K. Adhikari

doi:10.1016/S0921-4534(00)01774-3

paper

Mixing of superconducting $d_{x^{2} - y^{2}}$ state with s-wave states for different filling and temperature

arXiv:cond-mat/0012407 · doi:10.1016/S0921-4534(00)01774-3

Abstract

We study the order parameter for mixed-symmetry states involving a major $d_{x^{2} - y^{2}}$ state and various minor s-wave states ( $s$ , $s_{x y}$ , and $s_{x^{2} + y^{2}}$ ) for different filling and temperature for mixing angles 0 and $π /2$ . We employ a two-dimensional tight-binding model incorporating second-neighbor hopping for tetragonal and orthorhombic lattice. There is mixing for the symmetric $s$ state both on tetragonal and orthorhombic lattice. The $s_{x y}$ state mixes with the $d_{x^{2} - y^{2}}$ state only on orthorhombic lattice. The $s_{x^{2} + y^{2}}$ state never mixes with the $d_{x^{2} - y^{2}}$ state. The temperature dependence of the order parameters is also studied.

10 pages, 9 figures, accepted in Physica C

Mixing of superconducting dx2−y2​ state with s-wave states for different filling and temperature

Abstract

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Mixing of superconducting $d_{x^{2} - y^{2}}$ state with s-wave states for different filling and temperature