PHONON-ASSISTED RESONANT MAGNETOTUNNELING IN ALGAAS-GAAS-ALGAAS HETEROSTRUCTURES

The theory of inelastic electron resonant tunneling through a double-b arrier nanostructure is extended to establish a theory of phonon-assis ted resonant magnetotunneling when a magnetic field is applied paralle l to the tunneling current. At higher temperatures we have discovered an interesting characteristic oscillation of the width and height of t he main peak in the I-V curve when the ratio omega0/omega(c) changes b etween integer (double resonant) and half integer (single resonant), w here omega0 is the LO phonon frequency and omega(c) is the cyclotron f requency in the well. If confirmed experimentally, our theoretical pre diction provides an additional method to determine the electronic effe ctive mass in the well.