Random Spin-1 Quantum Chains

Details Random Spin-1 Quantum Chains Random Spin-1 Quantum Chains

1996-02-02

arxiv.org/abs/cond-mat/9602013v1

Physics

Condensed Matter

13 pages, Latex, no figures, to be published in Solid State Communications

Scientific paper

10.1016/0038-1098(96)00082-8

We study disordered spin-1 quantum chains with random exchange and
biquadratic interactions using a real space renormalization group approach. We
find that the dimerized phase of the pure biquadratic model is unstable and
gives rise to a random singlet phase in the presence of weak disorder. In the
Haldane region of the phase diagram we obtain a quite different behavior.

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