Quasiparticles of spatially anisotropic triangular antiferromagnets in a magnetic field
arXiv:0909.4283 · doi:10.1103/PhysRevLett.103.197203
Abstract
The spectral properties of the spin-1/2 Heisenberg antiferromagnet on an anisotropic triangular lattice in a magnetic field are investigated using a weak-interchain-coupling approach combined with exact solutions of a chain. Dominant modes induced by interchain interactions in a magnetic field behave as quasiparticles which show distinctive features such as anomalous incommensurate ordering and high-energy modes. In terms of them, various unusual features observed in the anisotropic triangular antiferromagnet Cs_2CuCl_4 in a magnetic field are quantitatively explained in a unified manner.
4 pages, 3 figures
References in corpus (5)
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- Ordering in spatially anisotropic triangular antiferromagnets
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