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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geprüft am 03.05.2024