Magnetoresistance studies of strongly coupled superlattices

We present magnetotransport results for strongly coupled InAs/GaSb superlattices. The low effective mass of carriers in the InAs/GaSb superlattice allows the study of the transport processes at fields above the magnetophonon condition, where the cyclotron spacing ℏωc is greater than the LO phonon energy ℏωLO. Magnetotransport results display Stark Cyclotron resonance and the Magnetophonon effect. Resonant tunnelling features change dramatically above the magnetophonon condition and suggest the superlattice undergoes formation of ordered electric field domain states linked to the observation of LO phonon mediated tunnelling.