Current and shot noise in double barrier resonant tunneling structures in a longitudinal magnetic field

Abstract

We study the resonant tunneling through double barrier structures in a longitudinal magnetic field. The study shows the necessity of taking into account both the energy dependence and the finiteness of the decay widths of the resonant energy levels, which are closely associated with interesting effects such as the hysteresis, the magnetic-field-induced negative differential conductance, and the shot noise suppression or enhancement. The Landau level quantization produces a strong fluctuation of the noise versus bias at a given magnetic field or the noise versus magnetic field at a given bias. The obtained results provide a better understanding of available experimental data. © 2007 The American Physical Society.