SUPERCURRENT OF A QUASI-ONE-DIMENSIONAL ANISOTROPIC SUPERCONDUCTOR

By solving the Andreev equations which approximate the Bogliubov-de Ge nnes equations in the WKBJ approximation, we calculate the supercurren t through a quasi-one-dimensional wire artificially fabricated with d( x2-y2)-wave superconductors. It is found that the supercurrent increas es stepwise as a function of the Fermi energy. More interestingly, the critical current for each channel depends strongly upon the angle bet ween the axis along which the wire lies and the crystalline axis of th e superconductor, which may help us determine the pairing symmetry of some high-T-c superconductors.