High Temperature Series Expansion of the Fluctuation of the Vector Chirality for the Spin-1/2 XY Antiferromagnet on the Triangular Lattice
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概要
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In spin models exhibiting a transition between a low temperature phase with longrange chiral order and a high temperature phase without such order, the thermal ex-pectation value of the square of the fluctuation in the chiral order parameter is ex-pected to diverge at the transition temperature. For the spin-1 / 2 X Y antiferromagneton the triangular lattice a space-type graph high temperature expansion is developedfor the fluctuation in the square of the vector chirality operator. Pad<: approximantanalysis of the first six terms of the series yields a pair of complex conjugate poles inthe complex K = 1 /kT plane, but provides no evidence for a phase transition in-dicated by a singularity on the real K axis.[hish temr>erature series exr>ansion,vector chiralitv,s: 1/2 .X'Iantiferromagnet, ]l triangular lattice, phase transitionl
- 社団法人日本物理学会の論文
- 1991-02-15
著者
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Fujiki Sumiyoshi
Department Of Physics Dalhousie University
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Fujiki Sumiyoshi
Department Of Applied Physics Tohoku University
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D.betts Donald
Department Of Physics Dalhousie University
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Betts Donald
Department Of Physics Dalhousie University
関連論文
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- On Long Range Chiral Order of the s=1/2 XY and Heisenberg Antiferromagnets on the Triangular Lattice
- High Temperature Series Expansion of the Fluctuation of the Vector Chirality for the Spin-1/2 XY Antiferromagnet on the Triangular Lattice
- Extension of the Method of Exact Diagonalization of Quantum Spin Models to Finite Face Centred Cubic Lattices and Estimation of the T=0 Properties of the S=1/2 XY Ferromagnet on the Infinite fcc Lattice
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