Vibronic and magnetic excitations in the spin-orbital liquid state of FeSc2S4.
Phys Rev Lett
; 94(23): 237402, 2005 Jun 17.
Article
en En
| MEDLINE
| ID: mdl-16090501
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.
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01-internacional
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MEDLINE
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En
Revista:
Phys Rev Lett
Año:
2005
Tipo del documento:
Article
País de afiliación:
Alemania