Weiss, Dieter and Klitzing, Klaus von and Ploog, K. and Weimann, G.
Magnetoresistance Oscillations in a Two-Dimensional Electron Gas Induced by a Submicrometer Periodic Potential.
Europhysics Letters 8, pp. 179-184.
Other URL: http://www.iop.org/EJ/abstract/-search=60887408.4/0295-5075/8/2/012, http://epljournal.edpsciences.org/
A new type of magnetoresistance oscillation periodic in 1/B is observed when the carrier density Ns of a two-dimensional electron gas is weakly modulated with a period smaller than the mean free path of the electrons. Experiments with high mobility AlGaAs-GaAs heterojunctions where Ns is modulated by holographic illumination at T ¡Ü 4.2 K show that the period of the additional quantum oscillation is determined by the separation a of the interference fringes. This period corresponds to Shubnikov-de Haas oscillations where only the electrons within the first reduced Brillouin zone with |k| ¦Ð/a contribute.