Title
<tex>$Cd^{+}(5s^{1})$</tex> centres in <tex>$Rb_{2}ZnCl_{2}$</tex> single crystals<tex>$Cd^{+}(5s^{1})$</tex> centres in <tex>$Rb_{2}ZnCl_{2}$</tex> single crystals
Author
Faculty/Department
Faculty of Sciences. Physics
Research group
Department of Physics
Experimental condensed matter physics (ECM)
Publication type
article
Publication
Berlin,
Subject
Physics
Source (journal)
Physica status solidi: B: basic research. - Berlin
Volume/pages
189(1995):2, p. 345-356
ISSN
0370-1972
ISI
A1995RE32200002
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Electron paramagnetic resonance and optical absorption spectra attributed to 5s(1) trapped electron Cd+(I) and Cd+(II) centres are observed over a broad temperature range in Rb2ZnCl4 single crystals doped with cadmium, after X-ray irradiation at 80 K and room temperature, respectively. The low temperature Cd+ (I) centre, which seems to be a substitutional Cd+ ion in a Zn2+ site, transforms into a Cd+ (II) centre at 190 K by trapping an anion vacancy, which has become mobile at this temperature, in its nearest-neighbour positions. The suggested structural models of the Cd+ centres are supported by the analysis of the spectral data considering covalency effects.
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