Quantum stabilization of 1/3-magnetization plateau in Cs_2CuBr_4

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

2008-09-22

arxiv.org/abs/0809.3800v1

Phys. Rev. Lett. 102, 137201 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

4+ pages, 2 figures

Scientific paper

10.1103/PhysRevLett.102.137201

We consider the phase diagram of a spatially anisotropic 2D triangular antiferromagnet in a magnetic field. Classically, the ground state is umbrella-like 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 planar state separating the two chiral phases. Our analysis sheds light on several recent experimental findings for the spin-1/2 system Cs_2CuBr_4.

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