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Real-Space Renormalization-Group Analysisof the S=2 Antiferromagnetic Heisenberg Chain

1995; Physical Society of Japan; Volume: 64; Issue: 2 Linguagem: Inglês

10.1143/jpsj.64.414

1347-4073

Yoshihiro Nishiyama, Keisuke Totsuka, Naomichi Hatano, Masuo Suzuki,

Advanced Condensed Matter Physics

The S=2 antiferromagnetic Heisenberg open chain is analyzed with the real-space numerical renormalization-group method improved by White. The low-ly ing spectrum and the one-point function are evaluated to show the degeneracy and the boundary effect on the ground state. Generalized string correlation funct ions were calculated for θ=π and θ=π 2. The θ=π 2 string correlation is found to indicate the long-range hidden order of the ground state. These results are quite consistent with the S=2 VBS argument.