Journal article
Perturbed bifurcations in the BCS gap equation
The anisotropic BCS gap equation is applied to a tight-binding model of layered high-temperature superconductors. The possible solutions have s-, d-, and mixed s- and d-wave symmetries using nearest-neighbor intralayer singlet pairing interaction of the same strength in the x and y directions. The transitions from d- or s- to mixed s- and d-wave solutions result from pitchfork bifurcations.
In the case of slightly different pairing strength in the x and y directions, perturbed pitchfork bifurcations emerge, leading to a dramatic change in the physical properties of the superconducting state.
Language: | English |
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Year: | 1992 |
Pages: | 7360-7367 |
ISSN: | 10953795 , 01631829 , 1550235x , 10980121 and 24699950 |
Types: | Journal article |
DOI: | 10.1103/PhysRevB.45.7360 |
ORCIDs: | Sørensen, Mads Peter |