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Fak, B., Bieri, S., Canevet, E., Messio, L., Payen, C., Viaud, M., Guillot-Deudon, C., Darie, C., Ollivier, J. & Mendels, P. (2017) Evidence for a spinon Fermi surface in the triangular S=1 quantum spin liquid Ba3NiSb2O9. Phys. Rev. B, 95 060402. 
Added by: Richard Baschera (2017-03-21 13:23:21)   Last edited by: Richard Baschera (2017-03-21 13:29:16)
Type de référence: Article
DOI: 10.1103/PhysRevB.95.060402
Numéro d'identification (ISBN etc.): 2469-9950
Clé BibTeX: Fak2017
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Catégories: INTERNATIONAL, MIOPS
Mots-clés: antiferromagnet, state
Créateurs: Bieri, Canevet, Darie, Fak, Guillot-Deudon, Mendels, Messio, Ollivier, Payen, Viaud
Collection: Phys. Rev. B
Consultations : 10/431
Indice de consultation : 3%
Indice de popularité : 0.75%
Résumé     
Inelastic neutron scattering is used to study the low-energy magnetic excitations in the spin-1 triangular lattice of the 6H-B phase of Ba3NiSb2O9. We study two powder samples: Ba3NiSb2O9 synthesized under high pressure and Ba2.5Sr0.5NiSb2O9 in which chemical pressure stabilizes the 6H-B structure. Themeasured excitation spectra show broad gapless and nondispersive continua at characteristic wave vectors. Our data rules out most theoretical scenarios that have previously been proposed for this phase, and we find that it is well described by an exotic quantum spin liquid with three flavors of unpaired fermionic spinons, forming a large spinon Fermi surface.
  
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