STRUCTURE OF H 2E OSCILLATIONS IN A ONE-DIMENSIONAL MESOSCOPIC RING/

The quantum oscillation in a one-dimensional ring with two leads is in vestigated with magnetic flux and electrostatic potential applied simu ltaneously. A transmission coefficient is derived for various conditio ns. The amplitude and frequency of the conductance oscillation in a me soscopic ring as a function of either potential are modulated by holdi ng the other constant. At a certain electrostatic potential and Fermi energy, h/2e oscillations are correctly predicted for the magnetostati c Aharonov-Bohm effect. A similar half-periodic oscillation occurs in the electrostatic case at a certain magnetic flux. A theory is formula ted from our earlier numerical calculations and phenomenological inter pretations, based on an analytical expression, for a fuller understand ing of the origin and mechanism of this behavior. We also investigate the influence of scattering at the junctions on the quantum oscillatio n.