We report on the first measurements of the drag effect between coupled 2D-hole gases. We investigate the coupling by changing the temperature, the carrier densities in the quantum wells and the widths of the barriers between the gases. From the data we are able to attribute the frictional drag to phonon coupling because the non-parabolicity allows the separate tuning of the Fermi wave vector and of the Fermi velocity allowing to distinguish between phonon- and plasmon-dominated coupling.
|Number of pages||4|
|Journal||Physica E: Low-Dimensional Systems and Nanostructures|
|State||Published - 1 Jan 2000|
|Event||13th International Conference on the Electronic Properties of Two-Dimensional Systems (EP2DS-13) - Ottawa, Ont, Can|
Duration: 1 Aug 1999 → 6 Aug 1999