Real-Space Renormalization Group Study of Effects of Anisotropy on S=1 Random Antiferromagnetic Chain
Shigeru Koikegami, Synge Todo, Hajime Takayama
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.
arXiv:cond-mat/0106289•Jun 15, 2001•0 citations