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

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

2000-12-21

arxiv.org/abs/cond-mat/0012407v1

Physica C 355 (2001) 77-86

Physics

Condensed Matter

Superconductivity

10 pages, 9 figures, accepted in Physica C

Scientific paper

10.1016/S0921-4534(00)01774-3

We study the order parameter for mixed-symmetry states involving a major $d_{x^2-y^2}$ state and various minor s-wave states ($s$, $s_{xy}$, and $s_{x^2+y^2}$) for different filling and temperature for mixing angles 0 and $\pi/2$. 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 $s_{xy}$ 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.

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