FEATURES OF QUANTUM MAGNETOTRANSPORT AND ELECTROMIGRATION IN MESOSCOPIC SYSTEMS

We have calculated the two-dimensional spatial distributions of several transport variables such as the current density, carrier concentration, chemical potential, space-charge electric field, residual resitivity dipole potential and electromigration forces in disordered mesoscopic structures subjected to arbitrary magnetic fields. These fully quantum mechanical calculations shed new light on such magnetotransport phenomena as the integer quantum Hall effect, the formation of magnetic bound states, magnetic response of curent vortices caused by quantum interference between scatterers, the nature of residual resistivity dipoles in phase coherent transport, the difference between majority- and minority-carrier mobilities in the quantum mechanical regime, the electron wind force and direct force of electromigration in a mesoscopic system, and a variety of other phenomena. © 1992.