PERSISTENT CURRENTS IN NORMAL-METAL MESOSCOPIC RING IN AN INHOMOGENEOUS MAGNETIC-FIELD

We have performed analytical calculations and computer simulations to study the persistent currents in one-dimensional normal metal mesoscopic ring in all inhomogeneous magnetic field. In the absence of disorder, the general exact solution is found. It is shown Brat the system supports persistent equilibrium spin anti charge currents, even in the absence of Aharonov-Bohm type flux. nle effects of disorder are to round off discontinuity in the charge current-flux characteristices and to reduce the amplitude of the current. In strong disorder, this characteristics is very similar to the AB case, but with a displacement.