Ultra-fast relaxation of electrons in wide-gap dielectrics / Fitting H. -J.,Kortov V. S.,Petite G. // JOURNAL OF LUMINESCENCE. - 2007. - V. 122, l. SI. - P. 542-545.

ISSN/EISSN:

0022-2313 / нет данных

Type:

Article; Proceedings Paper

Abstract:

Low-energy electrons scattered in the conduction band of a dielectric solid should behave like Bloch electrons and will interact with perturbations of the atomic lattice, i.e. with phonons. Thus the phonon-based description of low-energy scattering within an energy band structure of a solid bears certain advantages against common free-electron scattering mechanisms. Moreover, the inelastic scattering is described by the dielectric energy loss function. With these collective scattering models we have performed the simulation of excited electron relaxation and attenuation in the insulator SiO2. After excitation to a mean initial energy of several eV their energy relaxation occurs within a short time interval of 200fs to full thermalization. There is a very rapid impact ionization cooling connected with cascading of electrons at the beginning during the first 10fs, followed by much slower attenuation due to phonon losses in wide-gap dielectrics and insulators. (c) 2006 Elsevier B.V. All rights reserved.

Author keywords:

electron impact ionization; cascading; electron-phonon interaction; electron attenuation; thermalization SIO2; EMISSION; ENERGIES; OXYGEN; LAYERS; GAAS

DOI:

10.1016/j.jlumin.2006.01.188

Web of Science ID:

ISI:000242991900160

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	JAN-APR
Note	International Conference on Luminescence and Optical Spectroscopy of Condensed Matter, Beijing, PEOPLES R CHINA, JUL 25-29, 2006
Organization	Beijing Assoc Sci \& Technol; Beijing Jiaotong Univ; China Assoc Sci \& Technol; Chinese Phys Soc; Beijing Jiaotong Univ, Inst Optoelect Technol; KC Wong Educ Fdn; Natl Nat Sci Fdn China
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Keywords-Plus	SIO2; EMISSION; ENERGIES; OXYGEN; LAYERS; GAAS
Research-Areas	Optics
Web-of-Science-Categories	Optics
Author-Email	hans-joachim.fitting@uni-rostock.de
Number-of-Cited-References	10
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	1
Journal-ISO	J. Lumines.
Doc-Delivery-Number	119DH