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arXiv · 0710.5216

NMR evidence for the persistence of spin-superlattice above the 1/8 magnetization plateau in SrCu2(BO3)2

M. Takigawa·S. Matsubara·M. Horvatic·C. Berthier·H. Kageyama·Y. Ueda
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Abstract

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.

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M. Takigawa, S. Matsubara, M. Horvatic, C. Berthier, H. Kageyama, Y. Ueda. 2008-07-20. NMR evidence for the persistence of spin-superlattice above the 1/8 magnetization plateau in SrCu2(BO3)2. https://doi.org/10.1103/physrevlett.101.037202

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