Phonon drag thermopower and weak localization

Details Phonon drag thermopower and weak localization Phonon drag thermopower and weak localization

1998-07-09

arxiv.org/abs/cond-mat/9807143v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

19 page Revtex file, 3 Postscript figure

Scientific paper

10.1103/PhysRevB.58.13181

Previous experimental work on a two-dimensional (2D) electron gas in a Si-on-sapphire device led to the conclusion that both conductivity and phonon drag thermopower $S^g$ are affected to the same relative extent by weak localization. The present paper presents further experimental and theoretical results on these transport coefficients for two very low mobility 2D electron gases in $\delta-$doped GaAs/Ga$_x$Al$_{1-x}$As quantum wells. The experiments were carried out in the temperature range 3-7K where phonon drag dominates the thermopower and, contrary to the previous work, the changes observed in the thermopower due to weak localization were found to be an order of magnitude less than those in the conductivity. A theoretical framework for phonon drag thermopower in 2D and 3D semiconductors is presented which accounts for this insensitivity of $S^g$ to weak localization. It also provides transparent physical explanations of many previous experimental and theoretical results.

Affiliated with

Also associated with

No associations

Rating

Phonon drag thermopower and weak localization 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 Phonon drag thermopower and weak localization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phonon drag thermopower and weak localization will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-297664