Physics – Condensed Matter
Scientific paper
2000-04-05
Physics
Condensed Matter
6 pgs, 5 Figures
Scientific paper
10.1088/0953-8984/13/28/306
In order to justify applicability of the standard approach of perturbation theory for the description of transport phenomena in wide-band polar semiconductors with strong electron-phonon interactions, we have compared dependences of energy losses to the lattice on the electron drift velocity obtained for different materials in the frameworks of (a) a perturbative approach based on calculation of the scattering rates from Fermi's golden rule and (b) a non-perturbative approach based on the path-integral formalism of Thornber and Feynman. Our results reveal that despite strong electron-phonon coupling in GaN and AlN such that intercollision times become of the order of the period of phonon oscillation, standard perturbative treatment can still be applied successfully for this type of material. Our findings also indicate possibility for unique long-distance runaway transport in nitrides which may occur at the pre-threshold electric fields. Polaron ground state energy and effective masses are calculated for GaN and AlN as well as for GaAs and Al_2 O_3.
Dutta Mala
Kim Ki Wook
Komirenko S. M.
Stroscio M. A.
No associations
LandOfFree
Applicability of Fermi golden rule and possibility of low-field runaway transport in nitrides 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 Applicability of Fermi golden rule and possibility of low-field runaway transport in nitrides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Applicability of Fermi golden rule and possibility of low-field runaway transport in nitrides will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-629748