Quilliam, J. A., Bert, F., Kermarrec, E., Payen, C., Guillot-Deudon, C., Bonville, P., Baines, C., Luetkens, H. & Mendels, P. (2012) Singlet Ground State of the Quantum Antiferromagnet Ba3CuSb2O9. Phys. Rev. Lett. 109 117203.
Added by: Laurent Cournède (2016-03-10 21:28:38) |
Type de référence: Article DOI: 10.1103/PhysRevLett.109.117203 Numéro d'identification (ISBN etc.): 0031-9007 Clé BibTeX: Quilliam2012 Voir tous les détails bibliographiques |
Catégories: MIOPS Mots-clés: heisenberg-antiferromagnet, model, order, spin-liquid, triangular-lattice Créateurs: Baines, Bert, Bonville, Guillot-Deudon, Kermarrec, Luetkens, Mendels, Payen, Quilliam Collection: Phys. Rev. Lett. |
Consultations : 1/567
Indice de consultation : 4% Indice de popularité : 1% |
Résumé |
We present local probe results on the honeycomb lattice antiferromagnet Ba3CuSb2O9. Muon spin relaxation measurements in a zero field down to 20 mK show unequivocally that there is a total absence of spin freezing in the ground state. Sb NMR measurements allow us to track the intrinsic susceptibility of the lattice, which shows a maximum at around 55 K and drops to zero in the low-temperature limit. The spin-lattice relaxation rate shows two characteristic energy scales, including a field-dependent crossover to exponential low-temperature behavior, implying gapped magnetic excitations.
Added by: Laurent Cournède |