Monte Carlo Renormalization Group Study of the Heisenberg and the XY Antiferromagnet on the Stacked Triangular Lattice and the Chiralφ^4 Model(General)

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概要

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• With the help of the improved Monte Carlo renormalization-group scheme, we numerically investigate the renormalization group flow of the antiferromagnetic Heisenberg and XY spin model on the stacked triangular lattice (STA-model) and its effective Hamiltonian, 2N-component chiral φ^4 model which is used in the field-theoretical studies. We find that the XY-STA model with lattice size 126 × 144 × 126 exhibits clear first-order behavior. We also find that the renormalization-group flow of the STA model is well reproduced by the chiral φ^4 model, and that there are no chiral fixed points of renormalization-group flow for N = 2 and 3 cases. This result indicates that the Heisenberg-STA model also undergoes first-order transition.

• 社団法人日本物理学会の論文
• 2003-01-15

著者

• Itakura M

  Jsps Center For Promotion Of Computational Science And Engineering Japan Atomic Energy Research Inst

• ITAKURA Mitsuhiro

  JSPS, Center for Promotion of Computational Science and Engineering, Japan Atomic Energy Research In

関連論文

• Monte Carlo Renormalization Group Study of the Heisenberg and the XY Antiferromagnet on the Stacked Triangular Lattice and the Chiralφ^4 Model(General)

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