Physics – Condensed Matter
Scientific paper
1995-07-17
Phys. Rev. B 52 (1995) 14796
Physics
Condensed Matter
RevTex, 21 pages, 7 postscript figures
Scientific paper
10.1103/PhysRevB.52.14796
We derive an expression for the drag rate (i.e., interlayer momentum transfer rate) for carriers in two coupled two-dimensional gases to lowest nonvanishing order in the screened interlayer electron--electron interaction, valid for {\sl arbitrary} intralayer scattering mechanisms, using the Boltzmann transport equation. We calculate the drag rate for experimentally relevant parameters, and show that for moderately high temperatures ($T\gtrsim 0.2 T_F$, where $T_F$ is the Fermi temperature) the dynamical screening of the interlayer results in a large enhancement of the drag rate due to the presence of coupled plasmon modes. This plasmon enhancement causes the scaled drag rate to have a peak (i) as a function of temperature at $T \approx 0.5 T_F$, and (ii) as a function of the ratio of densities of the carriers in the two layers when their Fermi velocities are equal. We also show that the drag rate can be significantly affected by the {\sl intralayer} scattering mechanisms; in particular, the drag rate changes approximately by a factor of 2 when the dopant layer modulation doped structures are moved in from 400~\AA to 100~\AA.
Flensberg Karsten
Hu Ben Yu-Kuang
No associations
LandOfFree
Plasmon enhancement of Coulomb drag in double quantum well systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Plasmon enhancement of Coulomb drag in double quantum well systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Plasmon enhancement of Coulomb drag in double quantum well systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-394823