Magnetization plateaus in one dimensional S=1/2 Heisenberg model with dimerization and quadrumerization
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概要
- 論文の詳細を見る
The one dimensional S = 1/2 Heisenberg model with dimerization (1 - j) and quadrumerization (delta) in the magnetic field is studied by means of the numerical exact diagonalization of finite size systems and the conformal field theory. It is found that the magnetization plateau at half of the saturation value exists for delta not equal 0. For delta = 0, this model is described by the conformal field theory with central charge c = 1 at this value of magnetization. The critical exponent upsilon which characterizes the delta-dependence of the width of the plateau is calculated using the level spectroscopy method. The j-dependence of the critical exponent upsilon is found to be non-monotonic and discontinuous at j = 0. The effective theory of the magnetization plateau is also presented for various limiting cases.
- 社団法人日本物理学会の論文
- 1999-02-15
著者
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Chen Wei
Department of Obstetrics and Gynecology, Kobe University Graduate School of Medicine
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Hida Kazuo
Department Of Physics Faculty Of Science Saitama University
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Hida Kazuo
Department Of Engineering Science Faculty Of Engineering Hokkaido University
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NAKANO Hiroki
Institute for Solid State Physics,University of Tokyo
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Nakano Hiroki
Institute For Solid Physics University Of Tokyo
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Chen Wei
Department Of Food And Nutrition Providence University
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Chen Wei
Department Of Chemical Engineering Nagoya University
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Chen Wei
Department of Cell Biology, Third Military Medical University
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