Magnetization of SrCu2(BO3)2 in ultrahigh magnetic fields up to 118 T

Abstract

The magnetization process of the orthogonal-dimer antiferromagnet SrCu2(BO3)2 is investigated in high magnetic fields of up to 118 T. A 1/2 plateau is clearly observed in the field range 84 to 108 T in addition to 1/8, 1/4 and 1/3 plateaux at lower fields. Using a combination of state-of-the-art numerical simulations, the main features of the high-field magnetization, a 1/2 plateau of width 24 T, a 1/3 plateau of width 34 T, and no 2/5 plateau, are shown to agree quantitatively with the Shastry-Sutherland model if the ratio of inter- to intra-dimer exchange interactions J'/J=0.63. It is further predicted that the intermediate phase between the 1/3 and 1/2 plateau is not uniform but consists of a 1/3 supersolid followed by a 2/5 supersolid and possibly a domain-wall phase, with a reentrance into the 1/3 supersolid above the 1/2 plateau.

5 pages + 10 pages supplemental material

References in corpus (6)

• Classical simulation of infinite-size quantum lattice systems in two spatial dimensions
• Implementing global Abelian symmetries in projected entangled-pair state algorithms
• 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${}_3$)${}_2$
• Microscopic mechanism for the 1/8 magnetization plateau in SrCu_2(BO_3)_2

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