A SEQUENTIAL APPROACH TO RESONANT MAGNETOTUNNELING IN DOUBLE-BARRIER HETEROSTRUCTURES

We study the resonant tunnelling in double-barrier heterostructures vi a Landau levels in the sequential tunnelling approach. The effects of the space-charge formation in the electrodes and in the well together with inelastic-scattering broadening are taken into account. Under app ropriate approximations, the tunnelling current and differential condu ctance can be written as simpler forms which analytically reproduce th e main features of experiments. Then the dependences on the temperatur e and magnetic field are studied numerically; these are also in accord ance with experiments.