Transient Hole-Polaron Optical Absorption in Li6Gd(BO3)(3) Crystals / Ogorodnikov I. N.,Poryvai N. E.,Pustovarov V. A.,Tolmachev A. V.,Yavetskii R. P.,Yakovlev V. Yu. // PHYSICS OF THE SOLID STATE. - 2009. - V. 51, l. 6. - P. 1160-1166.

ISSN/EISSN:

1063-7834 / нет данных

Type:

Article

Abstract:

Results of a study of transient optical absorption (TOA) and luminescence of lithium gadolinium orthoborate Li6Gd(BO3)(3) (LGBO) in the visible and UV spectral regions are presented. As revealed by absorption optical spectroscopy with nanosecond time resolution, the LGBO TOA derives from optical transitions in hole centers, with the optical density relaxation kinetics being mediated by interdefect tunneling recombination involving these centers and neutral lithium atoms acting as electronic Li-0 centers. At 290 K, the Li-0 centers are involved in thermostimulated migration, which is not accompanied by carrier transfer to the conduction or valence band. The slow components of the TOA decay kinetics, with characteristic times ranging from a few milliseconds to seconds, have been assigned to diffusion-limited annihilation of lithium interstitials with vacancies. The mechanisms responsible for the creation and relaxation of short-lived Frenkel defect pairs in the LGBO cation sublattice have been analyzed.

Author keywords:

SINGLE-CRYSTALS; LUMINESCENCE; LIB3O5; GROWTH; DEFECTS; CENTERS; EARTH

DOI:

10.1134/S1063783409060134

Web of Science ID:

ISI:000267042000013

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	SINGLE-CRYSTALS; LUMINESCENCE; LIB3O5; GROWTH; DEFECTS; CENTERS; EARTH
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	ogo@dpt.ustu.ru
ResearcherID-Numbers	Yavetskiy, Roman/J-4323-2015 Yakovlev, Victor/P-4197-2015 Ogorodnikov, Igor/B-4162-2011
ORCID-Numbers	Ogorodnikov, Igor/0000-0002-4700-2340 Yavetskiy, Roman/0000-0003-4260-5481
Funding-Acknowledgement	Russian Foundation for Basic Research {[}05-02-16530]
Funding-Text	We are grateful to A. A. Smirnov for his assistance in performing measurements.; This study was partially supported by the Russian Foundation for Basic Research (project no. 05-02-16530).
Number-of-Cited-References	32
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	15
Journal-ISO	Phys. Solid State
Doc-Delivery-Number	458RU