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Quantum stabilization of the 1/3-magnetization plateau in Cs_2CuBr_4

Alicea, Jason and Chubukov, Andrey V. and Starykh, Oleg A. (2009) Quantum stabilization of the 1/3-magnetization plateau in Cs_2CuBr_4. Physical Review Letters, 102 (13). p. 137201. ISSN 0031-9007.

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We consider the phase diagram of a spatially anisotropic 2D triangular antiferromagnet in a magnetic field. Classically, the ground state is umbrellalike for all fields, but we show that the quantum phase diagram is much richer and contains a 1/3-magnetization plateau, two commensurate planar states, two incommensurate chiral umbrella phases, and, possibly, a spin density wave state separating the two chiral phases. Our analysis sheds light on several recent experimental findings for Cs_2CuBr_4.

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Alicea, Jason0000-0001-9979-3423
Additional Information:© 2009 The American Physical Society. Received 24 September 2008; revised manuscript received 5 November 2008; published 30 March 2009. We acknowledge illuminating discussions with O. Motrunich, M. Takigawa, and Y. Takano, who we also thank for sharing experimental data. This work was supported by the Lee A. DuBridge Foundation (J. A.) and by NSF-DMR 0604406 (A.V.C.). PACS numbers: 75.10.Jm, 75.30.Ds, 75.50.Ee.
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Lee A. DuBridge FoundationUNSPECIFIED
Issue or Number:13
Record Number:CaltechAUTHORS:20090630-100559408
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14459
Deposited By: Tony Diaz
Deposited On:12 Aug 2009 19:55
Last Modified:09 Mar 2020 13:18

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