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Vibronic and magnetic excitations in the spin-orbital liquid state of FeSc2S4
- Source :
- Physical review letters. 94(23)
- Publication Year :
- 2004
-
Abstract
- Inelastic neutron scattering results on the spin-orbital liquid in FeSc2S4 are presented. This sulfospinel reveals strong geometric frustration in the spin and in the orbital sector. In the present experiments the orbital liquid is evidenced by a clear spectroscopic signature of a dynamic Jahn-Teller effect with a vibronic splitting 3Gamma approximately 2 meV in agreement with theoretical estimates. The excitations of the spin liquid reveal strong dispersion and can be characterized as cooperative spin excitations in a supercooled paramagnet with a spin gap of Delta approximately 0.2 meV.
Details
- ISSN :
- 00319007
- Volume :
- 94
- Issue :
- 23
- Database :
- OpenAIRE
- Journal :
- Physical review letters
- Accession number :
- edsair.pmid..........f3f2608d86dd011685ba2070b8a94974