Induction of non-d-wave order-parameter components by currents in d-wave superconductors
Martin Zapotocky, Dmitrii L. Maslov, Paul M. Goldbart
DOI 10.1103/PhysRevB.55.6599 · Physical Review B
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Abstract
It is shown, within the framework of the Ginzburg-Landau theory for a superconductor with dx2−y2 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 dxy(x2−y2)-wave components is 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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