First-Order Transition to Incommensurate Phase with Broken Lattice Rotation Symmetry in Frustrated Heisenberg Model(General)
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概要
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We study a finite-temperature phase transition in the two-dimensional classical Heisenberg model on a triangular lattice with a ferromagnetic nearest-neighbor interaction J_1 and an antiferromagnetic third-nearest-neighbor interaction J_3 using a Monte Carlo method. Apart from a trivial degeneracy corresponding to O(3) spin rotations, the ground state for J_3≠0 has a threefold degeneracy corresponding to 120° lattice rotations. We find that this model exhibits a first-order phase transition with the breaking of the threefold symmetry when the interaction ratio is J_3/J_1=-3.
- 社団法人日本物理学会の論文
- 2008-10-15
著者
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TAMURA Ryo
Institute for Solid State Physics, University of Tokyo
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KAWASHIMA Naoki
Institute for Solid State Physics, University of Tokyo
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Kawashima Naoki
Institute For Solid State Physics University Of Tokyo
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Tamura Ryo
Institute For Solid State Physics University Of Tokyo
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Kawashima Naoki
Univ. Tokyo Kashiwa Jpn
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