Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1997-07-30
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Revtex, 14 pages, 2 postscript figures
Scientific paper
The role of optical-phonons in frictional drag between two adjacent but electrically isolated two-dimensional electron gases is investigated. Since the optical-phonons in III-V materials have a considerably larger coupling to electrons than acoustic phonons (which are the dominant drag mechanism at low T and large separations) it might be expected that the optical phonons will give a large effect high temperatures. The two key differences between optical and acoustic phonon mediated drag are: (1) the optical phonon mediated interlayer interaction is short-ranged due to their negligible group velocity at the Brillouin zone center; and (2) the typical momentum transfer for an optical phonon mediated scattering is relatively large. These considerations make optical phonon mediated drag difficult to see in single subband GaAs systems, but it may be possible to see the effect in double subband GaAs systems or single subband quantum wells in a material with a lower effective mass and lower optical phonon energy such as InSb.
No associations
LandOfFree
Optical phonon induced frictional drag in coupled two-dimensional electron gases 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 Optical phonon induced frictional drag in coupled two-dimensional electron gases, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical phonon induced frictional drag in coupled two-dimensional electron gases will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-447171