Abstract
We show theoretically that the Coulomb drag rate between two parallel quasi-two-dimensional electron gases is substantially enhanced by the coupled acoustic and optic plasmon modes of the system at temperatures $T \gtrsim 0.2T_F$ (where $T_F$ is the Fermi temperature) for experimentally relevant parameters. The acoustic mode causes a sharp upturn in the scaled drag rate as a function of temperature at $T \approx 0.2 T_F$. Other experimental signatures of plasmon-dominated drag are a $d^{-3}$ dependence on the well separation $d$, and a peak in the drag rate as a function of relative carrier densities at matched Fermi velocities.
Original language | Undefined/Unknown |
---|---|
Journal | Physical Review Letters |
Volume | 73 |
Issue number | 26 |
Pages (from-to) | 3572-3575 |
ISSN | 0031-9007 |
DOIs | |
Publication status | Published - 26 Dec 1994 |
Keywords
- cond-mat