INTRINSIC AND EXTRINSIC ORIGINS OF THE POLAR KERR EFFECT IN A CHIRAL p-WAVE SUPERCONDUCTOR

Recently,the measurement of the polar Kerr effect (PKE) in the quasi two-dimensional superconductor Sr(2)RuO(4), which is motivated to observe the chirality of p(x) + ip(y)-wave pairing, has been reported. We clarify that the PKE has intrinsic and extrinsic (disorder-induced) origins. The extrinsic contribution would be dominant in the PKE experiment.