| Autor: |
Boothroyd AT; Department of Physics, University of Oxford, Oxford, United Kingdom., Gardiner CH, Lister SJ, Santini P, Rainford BD, Noailles LD, Currie DB, Eccleston RS, Bewley RI |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review letters [Phys Rev Lett] 2001 Mar 05; Vol. 86 (10), pp. 2082-5. |
| DOI: |
10.1103/PhysRevLett.86.2082 |
| Abstrakt: |
Neutron spectroscopic measurements of the magnetic excitations in PrO2 reveal (1) sharp peaks characteristic of transitions between levels of the 4f(1) configuration of Pr4+ 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 4f(1) configuration and provides strong evidence for a dynamic Jahn-Teller effect in the gamma(8) electronic ground state. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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