Article Dans Une Revue Physical Review Letters Année : 2008

NMR Evidence for the Persistence of a Spin Superlattice Beyond the 1/8 Magnetization Plateau in SrCu_2(BO_3)_2

Résumé

We present 11B NMR studies of the 2D frustrated dimer spin system SrCu2(BO3)2 in the field range 27 - 31 T covering the upper phase boundary of the 1/8 magnetization plateau, identified at 28.4 T. Our data provide a clear evidence that above 28.4 T the spin-superlattice of the 1/8 plateau is modified but does not melt even though the magnetization increases. Although this is precisely what is expected for a supersolid phase, the microscopic nature of this new phase is much more complex. We discuss the field-temperature phase diagram on the basis of our NMR data.

Dates et versions

hal-00336372 , version 1 (03-11-2008)

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M. Takigawa, S. Matsubara, M. Horvatic, Claude Berthier, H. Kageyama, et al.. NMR Evidence for the Persistence of a Spin Superlattice Beyond the 1/8 Magnetization Plateau in SrCu_2(BO_3)_2. Physical Review Letters, 2008, 101, pp.037202. ⟨10.1103/PhysRevLett.101.037202⟩. ⟨hal-00336372⟩

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