Spin Structure of an Antiferromagnetic Ising Model on Layered Triangular Lattices
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概要
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Recent theoretical and Monte Carlo studies are reviewed of the spin structure of an antiferromagnetic Ising model on the two types of layered triangular lattices, i.e., the hexagonal loosepacked (hlp) lattice and the hexagonal close-packed (hcp) lattice. In the hlp lattice, interlayer interactions stabilize an algebraic order of spins within a triangular lattice, that is characterized by a power decay of correlations, and a new type of ordered phase occurs, in which the spin structure described by three sublattices is randomly modulated both in space and in time. In the hcp lattice, the algebraic order becomes unstable even against weak interlayer interactions and any periodic ordered phase does not occur. On the basis of these spin structures, recent experiments on CsCoBr_3, CsCoCl_3 and LiNiO_2 are explained.
- 理論物理学刊行会の論文
- 1987-01-20
著者
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Matsubara Fumitaka
Department Of Applied Physics Faculty Of Engineering The University Of Tohoku
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Matsubara Fumitaka
Department Of Engineering Science Tohoku University
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Inawashiro Sakari
Department Of Applied Physics Faculty Of Engineering Toyoku University
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MATSUBARA Fumitaka
Department of Engineering Science, Tohoku University
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