Temperature behavior of the 6.05-eV band in optical absorption spectra of oxygen-deficient corundum / Vainshtein IA,Kortov VS // PHYSICS OF THE SOLID STATE. - 2000. - V. 42, l. 7. - P. 1259-1265.

ISSN/EISSN:

1063-7834 / нет данных

Type:

Article

Abstract:

The effect of temperature on the 6.05-eV absorption band in alpha-Al2O3 has been studied in the 80-515 K region. The data obtained are analyzed in terms of a one-coordinate model with strong electron-phonon coupling. This band is shown to be formed by two peaks at 5.91 and 6.22 eV (T = 293 K) originating from absorption at the F+ and F centers, respectively. An analysis of the experimental temperature dependences has allowed us to calculate the energies of effective phonons responsible for the broadening and shift of the peaks. The energies calculated agree with the data obtained in other studies and lie in the region of corundum acoustic-vibration frequencies. The Huang-Rhys factors have been evaluated for both centers and found to be close to the estimates made by other authors. The results are discussed in detail and compared with independent data on optical absorption and luminescence of anion centers in colored and irradiated alpha-Al2O3 single crystals. (C) 2000 MAIK ``Nauka/Interperiodica{''}.

Author keywords:

F+ CENTER; SAPPHIRE; AL2O3; LUMINESCENCE; ALPHA-AL2O3; CRYSTALS; STATES; ENERGY; OXIDE; GAP

DOI:

10.1134/1.1131373

Web of Science ID:

ISI:000087915500017

Соавторы в МНС:

Другие поля

Поле	Значение
Publisher	AMER INST PHYSICS
Address	2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
Language	English
Keywords-Plus	F+ CENTER; SAPPHIRE; AL2O3; LUMINESCENCE; ALPHA-AL2O3; CRYSTALS; STATES; ENERGY; OXIDE; GAP
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
ResearcherID-Numbers	Weinstein, Ilya/K-8178-2012
ORCID-Numbers	Weinstein, Ilya/0000-0002-5573-7128
Number-of-Cited-References	28
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	3
Journal-ISO	Phys. Solid State
Doc-Delivery-Number	329PJ