Dynamic electronic response of a quantum dot driven by time-dependent voltage.
We present a comprehensive theoretical investigation on the dynamic electronic response of a noninteracting quantum dot system to various forms of time-dependent voltage applied to the single contact lead. Numerical simulations are carried out by implementing a recently developed hierarchical equations of motion formalism [J. S. Jin et al., J. Chem. Phys. 128, 234703 (2008)], which is formally exact for a fermionic system interacting with grand canonical fermionic reservoirs, in the presence of arbitrary time-dependent applied chemical potentials. The dynamical characteristics of the transient transport current evaluated in both linear and nonlinear-response regimes are analyzed, and the equivalent classic circuit corresponding to the coupled dot-lead system is also discussed.
Zheng
Xiao
X
Department of Chemistry, Hong Kong University of Science and Technology, Kowloon, Hong Kong. chxzheng@ust.hk
Jin
Jinshuang
J
Yan
YiJing
Y