Mutual friction between parallel two-dimensional electron systems
Abstract
Frictional drag between isolated two-dimensional electron gases separated by a thin barrier has been observed at low temperatures in GaAs/AlGaAs double-quantum-well structures. Separate electrical connection to the two electron systems allows the injection of current into one and the detection of a small drag voltage across the other. The drag voltage is a direct measure of the interwell momentum relaxation rate. Measurements of this rate are in qualitative agreement with calculations of an interwell Coulomb scattering model.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 1991
- DOI:
- 10.1103/PhysRevLett.66.1216
- Bibcode:
- 1991PhRvL..66.1216G
- Keywords:
-
- 73.50.Dn;
- Low-field transport and mobility;
- piezoresistance