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 http://resolver.caltech.edu/CaltechAUTHORS:20090630-100559408
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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.
|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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|Deposited By:||Tony Diaz|
|Deposited On:||12 Aug 2009 19:55|
|Last Modified:||26 Dec 2012 11:03|
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