Shubnikov–de Haas-like oscillations in millimeterwave photoconductivity in a high-mobility two-dimensional electron gas

Millimeterwave photoconductivity in a high-mobility (formula presented) two-dimensional electron gas exhibits giant amplitude oscillations in a weak magnetic field. These oscillations resemble the Shubnikov–de Haas effect but their period is determined by (formula presented) where (formula presented) and (formula presented) are the millimeterwave and cyclotron frequencies, respectively. The major observations can be explained in terms of Landau-level transitions between spatially shifted oscillators. A (formula presented) momentum transfer is accompanying the transition where (formula presented) is the electron Fermi wave number.