LIGHT-INDUCED CHARGE-TRANSPORT IN BATIO3 VIA 3 CHARGE STATES OF RHODIUM

Autor(en): KROSE, H
SCHARFSCHWERDT, R
SCHIRMER, OF
HESSE, H
Stichwörter: BARIUM-TITANATE; Optics; PHOTOCONDUCTIVITY; Physics; Physics, Applied
Erscheinungsdatum: 1995
Herausgeber: SPRINGER VERLAG
Journal: APPLIED PHYSICS B-LASERS AND OPTICS
Volumen: 61
Ausgabe: 1
Startseite: 1
Seitenende: 7
Zusammenfassung: 
By combined studies of electron spin resonance and optical absorption at low temperatures, the charge-transfer bands of Rh5+ and Rh4+ are identified to be peaked near 1.6 and 1.9 eV, respectively. On this basis, the light-induced charge-transfer processes in BaTiO3:Rh are unraveled at room temperature. It is shown that three charge states of Rh are involved, leading to two levels: the shallow Rh-4+/5+ and the deeper Rh-3+/4+ level. The optical behaviour of these two levels corresponds to those expected from a `two-center' model. The present paper represents the first atomic-scale identification of three charge states of one element leading to optical `two-level' response.
ISSN: 09462171
DOI: 10.1007/BF01090965

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