O- dynamic Jahn-Teller polarons in KTaO3

Autor(en): Maiwald, M
Schirmer, OF
Stichwörter: Physics; Physics, Multidisciplinary; SPECTRUM
Erscheinungsdatum: 2003
Herausgeber: E D P SCIENCES
Journal: EUROPHYSICS LETTERS
Volumen: 64
Ausgabe: 6
Startseite: 776
Seitenende: 782
Zusammenfassung: 
It is analyzed how dynamic Jahn-Teller coupling of an O- hole with the surrounding lattice in oxide perovskites affects the electron paramagnetic resonance of shallow O- defects. The predicted unusual resonance parameters are seen to be realized by experimentally identified O- defects in KTaO3. These centers thus manifest the properties of dynamic Jahn-Teller hole polarons in oxide perovskites. By varying the strength of the Jahn-Teller coupling, a continuous transition to the static Jahn-Teller case is modelled. The latter situation describes the properties of O-polarons identified previously in other oxide perovskites.
ISSN: 02955075
DOI: 10.1209/epl/i2003-00625-3

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