Abstract
The authors report on modeling of transport spectroscopy in split-gate-controlled quantum constrictions. A mixed momentum-coordinate representation is employed to solve a set of time-dependent Lippmann-Schwinger equations with intricate coupling between the subbands and the sidebands. Our numerical results show that the transport properties are tunable by adjusting the ac-biased split gates and the applied perpendicular magnetic field. We illustrate the Aharonov-Bohm oscillation characteristics in the split-gated systems and the time-modulated quasibound-state features involving intersideband transitions.
5 More- Received 30 July 2009
DOI:https://doi.org/10.1103/PhysRevB.80.195322
©2009 American Physical Society