Dynamical Jahn-Teller and reorientation effects in the EPR spectrum of CaF2:O-

Bill, Hans; Silsbee, Robert H.

doi:10.1103/PhysRevB.10.2697

Scientific article

English

Dynamical Jahn-Teller and reorientation effects in the EPR spectrum of CaF2:O-

Contributors

Bill, Hans; Silsbee, Robert H.

Published in

Physical review. B, Condensed matter and materials physics, vol. 10, no. 7, p. 2697-2709

Publication date

1974

Abstract

The O- ion, substitutional for F- in CaF2, shows a Jahn-Teller effect associated with the electronic degeneracy of the unfilled p shell. The different Jahn-Teller distortions are coupled to each other via a partially quenched spin-orbit energy. The magnitude of this coupling, ~0.15 cm-1, may be estimated from an interpretation of the effects of applied stress on the low-temperature EPR spectrum. This coupling also results in reorientation of the center via a phonon-assisted tunneling process, whose magnitude can be estimated experimentally from the thermal broadening of the EPR in the range (5-20) °K, and theoretically, without adjustable parameters, from the results of the low-temperature experiments and the elastic constants of the host crystal. The results are in reasonable accord, giving support both to the proposed model for the center and to the usual theory for the phonon-assisted tunneling rates.

UNIGE affiliation entities

Faculté des sciences / Section de chimie et biochimie / Département de chimie physique

UNIGE research groups

Groupe Bill

Citation (ISO format)

BILL, Hans, SILSBEE, Robert H. Dynamical Jahn-Teller and reorientation effects in the EPR spectrum of CaF2:O-. In: Physical review. B, Condensed matter and materials physics, 1974, vol. 10, n° 7, p. 2697–2709. doi: 10.1103/PhysRevB.10.2697

Article (Published version)

Identifiers

PID : unige:3154
DOI : 10.1103/PhysRevB.10.2697

Additional URL for this publication

http://prola.aps.org/pdf/PRB/v10/i7/p2697_1

Journal ISSN

1098-0121

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21/09/2009 16:21:04

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21/09/2009 16:21:04

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14/03/2023 15:13:38

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14/03/2023 15:13:38

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29/10/2024 12:11:07

Dynamical Jahn-Teller and reorientation effects in the EPR spectrum of CaF2:O-

Contributors

Published in

Publication date

Abstract

UNIGE affiliation entities

UNIGE research groups

Citation (ISO format)

Main files (1)

Identifiers

Additional URL for this publication

Journal ISSN

Technical informations

Creation

First validation

Update

Status update

Last indexation