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arXiv · 1308.4151

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

Y. H. Matsuda·N. Abe·S. Takeyama·H. Kageyama·P. Corboz·A. Honecker·S. R. Manmana·G. R. Foltin·K. P. Schmidt·F. Mila
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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.

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Y. H. Matsuda, N. Abe, S. Takeyama, H. Kageyama, P. Corboz, A. Honecker, S. R. Manmana, G. R. Foltin, K. P. Schmidt, F. Mila. 2013-08-19. Magnetization of SrCu2(BO3)2 in ultrahigh magnetic fields up to 118 T. https://doi.org/10.1103/physrevlett.111.137204

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