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

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.

5 pages, 4 figures, published version

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• Dimensional reduction at a quantum critical point
• Field Induced Supersolid Phase in Spin-One Heisenberg Models
• Supersolid phase induced by correlated hopping in spin-1/2 frustrated quantum magnets
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Cited by in corpus (9)

• Incomplete devil's staircase in the magnetization curve of SrCu2(BO3)2
• Effective Theory of Magnetization Plateaux in the Shastry-Sutherland Lattice
• Field dependence of the quantum ground state in the Shastry-Sutherland system SrCu${}_2$(BO${}_3$)${}_2$
• Magnetization Plateau of Classical Ising Model on Shastry-Sutherland Lattice
• Microscopic mechanism for the 1/8 magnetization plateau in SrCu_2(BO_3)_2
• Magnetization plateau and supersolid phases in the spin-1/2 antiferromagnetic Heisenberg model on a tetragonally distorted fcc lattice
• Dimer-induced heavy-fermion superconductivity in the Shastry-Sutherland Kondo lattice model
• Magnetization plateaux in an extended Shastry-Sutherland model
• Insulator-metal transition and quasi-flat-band of Shastry-Sutherland lattice