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dc.contributor.authorHarada, Kenjija
dc.contributor.alternative原田, 健自ja
dc.description.abstractThe ground state of an S=1/2 antiferromagnetic Heisenberg model on a spatially anisotropic triangular lattice, which is an effective model of Mott insulators on a triangular layer of organic charge transfer salts or Cs[2]CuCl[4], is numerically studied. We apply a numerical variational method by using a tensor network with entanglement renormalization, which improves the capability of describing a quantum state. Magnetic ground states are identified for 0.7≤J[2]/J[1]≤1 in the thermodynamic limit, where J1 and J2 denote the innerchain and interchain coupling constants, respectively. Except for the isotropic case (J[1]=J[2]), the magnetic structure is spiral with an incommensurate wave vector that is different from the classical one. The quantum fluctuation weakens the effective coupling between chains, but the magnetic order remains in the thermodynamic limit. In addition, the incommensurate wave number is in good agreement with that of the series expansion method.ja
dc.publisherAmerican Physical Societyja
dc.rights©2012 American Physical Societyja
dc.titleNumerical study of incommensurability of the spiral state on spin-1/2 spatially anisotropic triangular antiferromagnets using entanglement renormalizationja
dc.type.niitypeJournal Articleja
dc.identifier.jtitlePhysical Review Bja
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