Admittance and Nonlinear Transport in Quantum Wires, Point Contacts, and Resonant Tunneling Barriers

Abstract

The admittance determines the current response of an electrical conductor to oscillating voltages applied to its contacts. The admittance and the nonlinear dc-transport have in common that they require both an understanding of the charge distribution which is established as the conductor is driven away from its equilibrium state. The dynamic and the nonlinear transport can thus be viewed as probes of the charge response of the conductor. In contrast, linear dc-transport is determined by the equilibrium charge distribution alone. Thus the dynamic conductance and the nonlinear transport provide information which cannot be gained from a linear dc-measurementKeywordsQuantum WireCharacteristic PotentialElectrochemical CapacitanceQuantum Point ContactResonant LevelThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.