Real-Space Renormalization Group Study of Effects of Anisotropy on S=1 Random Antiferromagnetic Chain

Details Real-Space Renormalization Group Study of Effects of Anisotropy on S=1 Random Antiferromagnetic Chain Real-Space Renormalization Group Study of Effects of Anisotropy on S=1 Random Antiferromagnetic Chain

2001-06-15

arxiv.org/abs/cond-mat/0106289v2

Physics

Condensed Matter

Statistical Mechanics

9 pages including 4 figures

Scientific paper

We investigate S=1 antiferromagnetic quantum spin chain, whose exchange couplings are strongly disordered. By the real-space renomalization group method, introduced by Ma, Dasgupta, and Hu, the renormalization group flows are analyzed numerically in a plain of the anisotoropy of the exchange coupling vs. the staggered magnetic field. As the result, the Heisenberg point, which has a zero average of the exchange coupling anisotropy, is specified as the unstable fixed point against the anisotropy.

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