Abstract
We show theoretically that the Coulomb drag rate between two parallel quasi-two-dimensional electron gases with equal Fermi velocities is substantially enhanced by the coupled acoustic and optic plasmon modes at temperatures T≳0.2TF (where TF is the Fermi temperature) for experimentally relevant parameters. The acoustic mode causes a sharp upturn in the scaled drag rate with increasing temperature at T≈0.2TF. Other experimental signatures of the plasmon-dominated drag rate are a d-3 dependence on the well separation d and a peak as a function of relative densities at matched Fermi velocities.
Original language | English |
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Journal | Physical Review Letters |
Volume | 73 |
Issue number | 26 |
Pages (from-to) | 3572-3575 |
ISSN | 0031-9007 |
DOIs | |
Publication status | Published - 1994 |
Bibliographical note
Copyright (1994) by the American Physical Society.Keywords
- 2-DIMENSIONAL ELECTRON-SYSTEMS
- SCATTERING
- MUTUAL DRAG
- HOLE TRANSPORT
- EXCITATIONS
- HETEROSTRUCTURES
- 2D
- GAS LAYERS
- SPATIALLY SEPARATED ELECTRON