Quantum stabilization of the 1/3-magnetization plateau in Cs2CuBr4

Jason Alicea, Andrey V. Chubukov, Oleg A. Starykh

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93 Scopus citations


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 Cs2CuBr4.

Original languageEnglish (US)
Article number137201
JournalPhysical review letters
Issue number13
StatePublished - Mar 30 2009


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