Antiferromagnetic Transition Temperature and Spin Correlations in Quasi-Two-Dimensional Spin-Fermion Model
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概要
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Spin-fermion model on the CuO_2 lattice of the copper oxide high temperature super-conductors with inter-CuO_2-plane interaction is studied in a perturbation theory with respect to the spin-fermion coupling. Spin waves in a short-range order are phenomenologically assumed, and modification of the spin waves by hole doping which makes the spin correlation functions satisfy the sum rule is taken into account. Antiferromagnetic (AF) phase boundary is obtained on the temperature and hole concentration plane for various strength of the inter-CuO_2-plane interaction. AF spin correlation length is also calculated. Relation between the results and experimental results of the copper oxides is discussed.
- 社団法人日本物理学会の論文
- 1993-04-15
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