Non-linear effects in resonant tunnelling through a quantum dot

We study resonant tunneling transport properties of a quantum dot connected to two leads. The flowing electrons are supposed to interact strongly at t he quantum dot. The system is represented by an Anderson impurity Hamiltoni an. The transport properties are characterized by the well-known Coulomb bl ockade properties. However, superimposed to them, this one-dimensional (1D) system possesses novel non-linear current static hi-stability behavior and other time-dependent instability phenomena, probably current and charge os cillations. (C) 1999 Elsevier Science Ltd. All rights reserved.