Magnetization of SrCu2(BO3)(2) in Ultrahigh Magnetic Fields up to 118 T

作者：Matsuda Y H^*; Abe N; Takeyama S; Kageyama H; Corboz P; Honecker A; Manmana S R; Foltin G R; Schmidt K P; Mila F

来源：Physical Review Letters, 2013, 111(13): 137204.

DOI：10.1103/PhysRevLett.111.137204

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 plateaus 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 intradimer exchange interactions J%26apos;/J = 0.63. It is further predicted that the intermediate phase between the 1/3 and 1/2 plateaus 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.

• 出版日期2013-9-26