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PhysRevB.86.184421.pdf2.02 MBAdobe PDF見る/開く
タイトル: Numerical study of incommensurability of the spiral state on spin-1/2 spatially anisotropic triangular antiferromagnets using entanglement renormalization
著者: Harada, Kenji  kyouindb  KAKEN_id
著者名の別形: 原田, 健自
発行日: 16-Nov-2012
出版者: American Physical Society
誌名: Physical Review B
巻: 86
号: 18
論文番号: 184421
抄録: The 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.
著作権等: ©2012 American Physical Society
URI: http://hdl.handle.net/2433/200791
DOI(出版社版): 10.1103/PhysRevB.86.184421
出現コレクション:学術雑誌掲載論文等

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