期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 109, 期 31, 页码 12404-12407出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1200743109
关键词
high magnetic fields; quantum magnet; field-induced magnetic texturing; density matrix renormalization group; magnetocaloric effect
资金
- National Science Foundation [DMR-0955707]
- Research Initiative: Materials Science and Condensed Matter Research at HLD
- Euro-MagNET II under the European Union [228043]
- National Science Foundation
- US Department of Energy
- State of Florida
- U.S. DOE BES project Science at 100 T
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1339564] Funding Source: National Science Foundation
Strong geometrical frustration in magnets leads to exotic states such as spin liquids, spin supersolids, and complex magnetic textures. SrCu2(BO3)(2), a spin-1/2 Heisenberg antiferromagnet in the arche-typical Shastry-Sutherland lattice, exhibits a rich spectrum of magnetization plateaus and stripe-like magnetic textures in applied fields. The structure of these plateaus is still highly controversial due to the intrinsic complexity associated with frustration and competing length scales. We discover magnetic textures in SrCu2(BO3)(2) via magnetostriction and magnetocaloric measurements in fields up to 100.75 T. In addition to observing low-field fine structure with unprecedented resolution, the data also reveal lattice responses at 73.6 T and at 82 T that we attribute, using a controlled density matrix renormalization group approach, to a unanticipated 2/5 plateau and to the long-predicted 1/2 plateau.
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