1996/02/02 by Beatriz Boechat, Andreia Saguia, Mucio A. Continentino +1 · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Quantum many-body systems #Theoretical and Computational Physics #cond-mat
paper · pdf · doi:10.1016/0038-1098(96)00082-8
13 pages, Latex, no figures, to be published in Solid State Communications
arxiv created 1996/02/02 · openalex publication_date 1996/05/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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.