Ground-State Long-Range Order in the Two-Dimensional XXZ Model
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概要
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We prove the existence of N<"el-type long-rang,e order in the ground state of thespin- 1 /2 XXZ model with A (exchange anisotropy) >1.67 on the square lattice. Wefurther show the existence of long-range order for A >1 . 10 and 0 @A< 0.59 by assuming monotonicity of nearest neighbor correlations as functions of the system size. Theassumption of monotonicity is supported by numerical calcttlations.
- 社団法人日本物理学会の論文
- 1989-03-15
著者
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Ozeki Yukiyasu
Department Of Physics Tokyo Institute Of Technology
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Nishimori Hidetoshi
Department Of Physics Facuilty Of Science Tokyo Institute Of Technology
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Ozeki Yukiyasu
Department Of Applied Physics And Chemistry The University Of Electro-communications
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