Quantum Monte Carlo simulation of resonant tunneling diodes based on the Wigner distribution function formalism

A tool for the simulation of resonant tunneling diodes (RTDs) has been deve loped. This is based on the solution of the quantum Liouville equation in t he active region of the device and the Boltzman transport equation in the r egions adjacent to the contacts by means of a Monte Carlo algorithm. By acc urately coupling both approaches to current transport, we have developed a quantum simulation tool that allows the use of simulation domains much larg er and realistic than those previously considered, without a significant in crease in computational burden. The main characteristics expected for the c onsidered devices are clearly obtained, thus supporting the validity of our tool for the simulation of RTDs. (C) 1998 American Institute of Physics. [ S0003-6951(98)00550-6].