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Phys. Rev. Lett. 82, 3168–3171 (1999)

Exact Dimer Ground State and Quantized Magnetization Plateaus in the Two-Dimensional Spin System SrCu2(BO3)2

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H. Kageyama1,2,*, K. Yoshimura1,3,†, R. Stern3, N. V. Mushnikov2, K. Onizuka2, M. Kato1, K. Kosuge1, C. P. Slichter3, T. Goto2, and Y. Ueda2
1Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
2Institute for Solid State Physics, University of Tokyo, Roppongi, Minato-ku, Tokyo 106-8666, Japan
3Loomis Laboratory of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801-3080

Received 5 June 1998; published in the issue dated 12 April 1999

Magnetic susceptibility, Cu NQR, and high-filed magnetization have been measured in polycrystalline SrCu2(BO3)2 having a two-dimensional (2D) orthogonal network of Cu dimers. This cuprate provides a new class of 2D spin-gap system (Δ = 30K) in which the ground state can be solved “exactly.” Furthermore, in the magnetization, two plateaus corresponding to 1/4 and 1/8 of the full Cu moment were first observed for 2D quantum spin systems.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.3168
DOI:
10.1103/PhysRevLett.82.3168
PACS:
76.60.-k, 75.40.Cx

*Present address: Institute for Solid State Physics, University of Tokyo, Tokyo, Japan.

†Permanent address: Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto, Japan.

 
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