Intensive far-infrared optical study on the donor impurity band in the presence of a magnetic field for n-GaAs

Citation
H. Kobori et al., Intensive far-infrared optical study on the donor impurity band in the presence of a magnetic field for n-GaAs, PHYSICA B, 302, 2001, pp. 17-22
Citations number
6
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
0921-4526 → ACNP
Volume
302
Year of publication
2001
Pages
17 - 22
Database
ISI
SICI code
0921-4526(200108)302:<17:IFOSOT>2.0.ZU;2-V
Abstract
We have intensively studied donor impurity bands formed by the ground and e xcited states in the presence of a magnetic field by means of the far-infra red optical technique. With this view, we have carried out measurements of the impurity cyclotron resonance absorption (ICRA) for hydrogenic donors in n-GaAs. Concerning the optical transition between the 1s and 2p(+1) states , the variation of the full-width at half-maximum (FWHM) for the ICRA has b een investigated as functions of the donor concentration and the magnetic f ield. Those dependencies of the FWHM have been discussed in consideration o f energy bandwidths of the 1s and 2p(+1) states for donors in the presence of a magnetic field. The energy bandwidths have been estimated by use of th e tight binding approximation for the linens combinations of atomic orbital s, assuming the simple cubic configuration of donors. The qualitative agree ment between experimental results and numerical estimation has been obtaine d. (C) 2001 Elsevier Science B.V. All rights reserved.