Abstract
The magnetization process of the orthogonal-dimer antiferromagnet is investigated in high magnetic fields of up to 118 T. A plateau is clearly observed in the field range 84 to 108 T in addition to , , and plateaus at lower fields. Using a combination of state-of-the-art numerical simulations, the main features of the high-field magnetization, a plateau of width 24 T, a plateau of width 34 T, and no plateau, are shown to agree quantitatively with the Shastry-Sutherland model if the ratio of inter- to intradimer exchange interactions . It is further predicted that the intermediate phase between the and plateaus is not uniform but consists of a supersolid followed by a supersolid and possibly a domain-wall phase, with a reentrance into the supersolid above the plateau.
- Received 22 August 2013
DOI:https://doi.org/10.1103/PhysRevLett.111.137204
© 2013 American Physical Society