title: Negative differential resistance in nanoscale transport in the Coulomb blockade regime.
abstract: Motivated by recent experiments, we have studied the transport behavior of coupled quantum dot systems in the Coulomb blockade regime using the master (rate) equation approach. We explore how electron-electron interactions in a donor-acceptor system, resembling weakly coupled quantum dots with varying charging energy, can modify the system's response to an external bias, taking it from normal Coulomb blockade behavior to negative differential resistance (NDR) in the current-voltage characteristics.
authors.affiliation: Theoretical Sciences Unit, Jawaharlal Nehru Centre For Advanced Scientific Research, Jakkur Campus, Bangalore 560064, India. DST Unit on Nanoscience, Jakkur Campus, Bangalore 560064, India.
authors.forename: Prakash
authors.initials: P
authors.lastname: Parida
authors.forename: S
authors.initials: S
authors.lastname: Lakshmi
authors.forename: Swapan K
authors.initials: SK
authors.lastname: Pati