Induction of non-d-wave order-parameter components by currents in d-wave superconductors

Details Induction of non-d-wave order-parameter components by currents in d-wave superconductors Induction of non-d-wave order-parameter components by currents in d-wave superconductors

1996-10-08

arxiv.org/abs/cond-mat/9610063v1

Phys. Rev. B 55, 6599 (1997)

Physics

Condensed Matter

Superconductivity

15 pages, includes 2 figures. To appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.55.6599

It is shown, within the framework of the Ginzburg-Landau theory for a superconductor with d_{x^2-y^2} symmetry, that the passing of a supercurrent through the sample results, in general, in the induction of order-parameter components of distinct symmetry. The induction of s-wave and d_{xy(x^2-y^2)-wave components are considered in detail. It is shown that in both cases the order parameter remains gapless; however, the structure of the lines of nodes and the lobes of the order parameter are modified in distinct ways, and the magnitudes of these modifications differ in their dependence on the (a-b plane) current direction. The magnitude of the induced s-wave component is estimated using the results of the calculations of Ren et al. [Phys. Rev. Lett. 74, 3680 (1995)], which are based on a microscopic approach.

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