NATURE OF COHERENT ENHANCEMENT OF INELASTIC ELECTRON-SCATTERING FROM DISORDERED MEDIA

Citation
Vv. Rumyantsev et al., NATURE OF COHERENT ENHANCEMENT OF INELASTIC ELECTRON-SCATTERING FROM DISORDERED MEDIA, Zeitschrift fur Physik. B, Condensed matter, 103(1), 1997, pp. 53-60
Citations number
42
Categorie Soggetti
Physics, Condensed Matter
ISSN journal
07223277
Volume
103
Issue
1
Year of publication
1997
Pages
53 - 60
Database
ISI
SICI code
0722-3277(1997)103:1<53:NOCEOI>2.0.ZU;2-8
Abstract
The mechanism of weak localization of relatively fast electrons scatte red with a fixed energy loss from disordered media is examined. The ma in focus of this paper is to put forward an explanation for why cohere nt enhancement of electron scattering in the inelastic-scattering chan nel takes place at angles which differ from pi. A simplified kinematic model is proposed to determine the basic properties of the weak local ization of electrons in the inelastic scattering channel. The model ea sily reproduces the range of scattering angles typical for the weak lo calization of electrons with fixed energy loss. The procedure does not require calculation of the contribution from the crossed diagrams. Th e results agree with those based on the dynamical theory associated wi th the calculation of the crossed and ladder diagrams. It is possible to follow the transition from the weak localization of the new type to the ordinary weak localization with decreasing energy loss. The weak localization of the new type is in accord with the weak localization o f regular type if the energy loss is about the energy of an optical ph onon.