Localized 4f States and Dynamic Jahn-Teller Effect in PrO2

Boothroyd, A.T., Gardiner, C.H., Lister, S.J.S., Santini, P., Rainford, B.D., Noailles, L.D., Currie, D.B., Eccleston, R.S. and Bewley, R.I. (2001) Localized 4f States and Dynamic Jahn-Teller Effect in PrO2. Physical Review Letters, 86(10), pp. 2082-2085. (doi:10.1103/PhysRevLett.86.2082) (PMID:11289860)

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Abstract

Neutron spectroscopic measurements of the magnetic excitations in PrO 2 reveal (1) sharp peaks characteristic of transitions between levels of the 4 f 1 configuration of Pr 4 + split by the cubic crystal field, and (2) broad bands of scattering centered near 30 and 160 meV. We present a simple model based on a vibronic Hamiltonian that accounts for these contrasting features of the data. The analysis shows that 90 % ± 10 % of the Pr ions have a localized 4 f 1 configuration and provides strong evidence for a dynamic Jahn-Teller effect in the Γ 8 electronic ground state.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Webster, Dr Carol
Authors: Boothroyd, A.T., Gardiner, C.H., Lister, S.J.S., Santini, P., Rainford, B.D., Noailles, L.D., Currie, D.B., Eccleston, R.S., and Bewley, R.I.
College/School:College of Science and Engineering > School of Computing Science
Journal Name:Physical Review Letters
Journal Abbr.:Phys Rev Lett
Publisher:American Physical Society
ISSN:0031-9007
ISSN (Online):1079-7114

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