Magnetoresistance Oscillations in a Two-Dimensional Electron Gas Induced by a Submicrometer Periodic Potential
- 15 January 1989
- journal article
- Published by IOP Publishing in Europhysics Letters
- Vol. 8 (2), 179-184
- https://doi.org/10.1209/0295-5075/8/2/012
Abstract
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 ≤ 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| < π/a contribute.Keywords
This publication has 7 references indexed in Scilit:
- Magnetic depopulation of subbands and universal conductance fluctuations in quasi-one dimensional GaAsAlGaAs heterostructuresSuperlattices and Microstructures, 1987
- Magnetic Depopulation of 1D Subbands in a Narrow 2D Electron Gas in a GaAs:AlGaAs HeterojunctionPhysical Review Letters, 1986
- Transient and persistent photoconductivity in n-AlxGa1-xAs and selectively doped n-AlxGa1-xAs/GaAs heterostructuresJournal of Physics C: Solid State Physics, 1985
- Spatially modulated photoconductivity at N-AlGaAs/GaAs heterojunctions and formation of persistent charge patterns with submicron dimensionsApplied Physics Letters, 1984
- Selectively dopedn-AlxGa1?xAs/GaAs heterostructures with high-mobility two-dimensional electron gas for field effect transistorsApplied Physics A, 1984
- Magnetic-Field Dependence of the Ultrasonic Attentuation in MetalsPhysical Review B, 1960
- A proposal for determining the fermi surface by magneto-acoustic resonancePhilosophical Magazine, 1957