most citedPhase Diagram of the 1/2-1/2-1-1 Spin Chain by the Nonlinear Sigma Model

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cond-mat.str-el1999★ 3 cited

Phase Diagram of the 1/2-1/2-1-1 Spin Chain by the Nonlinear Sigma Model

Ken'ichi Takano

We examine a periodic mixed spin chain with spin magnitudes 1/2 and 1 which are arrayed as 1/2-1/2-1-1. The three independent parameters are ratios of the four exchange couplings.…