Should one expect injected charge carrier velocities to saturate as the applied electric field is increased simply because of the nonparabolicity of bands? Does the apparent saturation observed in recent experiments in hydrocarbon crystals signify, as supposed in some current interpretations of the data, that the carrier motion is coherent or bandlike and that the disappearance of the saturation at higher temperatures is indicative of a crossover from coherent to incoherent motion? These questions are addressed with the help of general theoretical investigations involving Drude-like considerations, quantum kinetic equations, and a Fokker-Planck analysis.
V. M. Kenkre and P. E. Parris, "Saturation of Charge Carrier Velocity with Increasing Electric Fields: Theoretical Investigations for Pure Organic Crystals," Physical Review B - Condensed Matter and Materials Physics, vol. 65, no. 20, pp. 2051041-20510411, American Physical Society (APS), May 2002.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevB.65.205104
Keywords and Phrases
Hydrocarbon; Crystal; Electric Field; Kinetics; Motion; Temperature; Velocity
International Standard Serial Number (ISSN)
Article - Journal
© 2002 American Physical Society (APS), All rights reserved.