%0 Journal Article
%T Magnetization of SrCu2(BO3)2 in ultrahigh magnetic fields up to 118 T
%A Y. H. Matsuda
%A N. Abe
%A S. Takeyama
%A H. Kageyama
%A P. Corboz
%A A. Honecker
%A S. R. Manmana
%A G. R. Foltin
%A K. P. Schmidt
%A F. Mila
%J Physics
%D 2013
%I arXiv
%R 10.1103/PhysRevLett.111.137204
%X 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.
%U http://arxiv.org/abs/1308.4151v1