ISSN:
1432-0649
Keywords:
71.55
;
76.30.Da
;
78.50
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract 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 Rh4+/5+ and the deeper Rh3+/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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01090965
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