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New Polaronic-Type Excitons in Ferroelectric Oxides: INDO-Calculations and Experimental Manifestation

Published online by Cambridge University Press:  21 March 2011

Valentin S. Vikhnin ,
Roberts I. Eglitis ,
Eugene A. Kotomin ,
Siegmar Kapphan  and
Gunnar Borstel
Valentin S. Vikhnin
Affiliation:
A.F. Ioffe Physical Technical Institute, 194021, Saint-Petersburg, Russia
Roberts I. Eglitis
Affiliation:
Universität Osnabrück, Fachbereich Physik, D- 49069 Osnabrück, Germany
Eugene A. Kotomin
Affiliation:
Universität Osnabrück, Fachbereich Physik, D- 49069 Osnabrück, Germany Institute for Solid State Physics, University of Latvia, Kengaraga str. 8, Riga LV-1063, Latvia
Siegmar Kapphan
Affiliation:
Universität Osnabrück, Fachbereich Physik, D- 49069 Osnabrück, Germany
Gunnar Borstel
Affiliation:
Universität Osnabrück, Fachbereich Physik, D- 49069 Osnabrück, Germany
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Abstract

The current experimental and theoretical knowledge of new polaronic-type excitons in ferroelectric oxides – charge transfer vibronic excitons (CTVE) – is discussed. It is shown that Hartree-Fock-type INDO calculations as well as photoluminescence studies in ferroelectric oxygen-octahedral perovskites confirm the CTVE-concept. Single CTVE as well as a new phase of strongly correlated CTVEs are analysed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 677: Symposium AA – Advances in Materials Theory and Modeling–Bridging Over Multiple-Length and Time Scales , 2001 , AA4.15
Copyright
Copyright © Materials Research Society 2001

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References

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