TIME-DEPENDENT TRANSPORT THROUGH A MESOSCOPIC STRUCTURE | |
Note | |
关键词: RESONANT-TUNNELING STRUCTURES; OSCILLATIONS; VOLTAGE; | |
DOI : 10.1103/PhysRevB.48.8487 | |
来源: SCIE |
【 摘 要 】
A general formulation is presented of the nonlinear, time-dependent current through a small interacting region, where electron energies are changed by time-dependent voltages. An exact solution is obtained for the noninteracting case when the elastic coupling to the leads is independent of energy. Temporal phase coherence in a double-barrier tunneling structure produces ''ringing'' in the response of the current to a voltage pulse, which can be observed experimentally in the dc current by varying the pulse length in a train of voltage pulses. The nonlinear current due to an ac bias also shows complex time dependence.
【 授权许可】
Free