Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/59433
Type: Artigo de periódico
Title: Phase diagrams and universality classes of random antiferromagnetic spin ladders
Author: Hoyos, JA
Miranda, E
Abstract: The random antiferromagnetic two-leg and zigzag spin- 1/2 ladders are investigated using the real space renormalization group scheme and their complete phase diagrams are determined. We demonstrate that the first system belongs to the same universality class of the dimerized random spin- 1/2 chain. The zigzag ladder, on the other hand, is in a random singlet phase at weak frustration and disorder. Otherwise, we give additional evidence that it belongs to the universality class of the random antiferromagnetic and ferromagnetic quantum spin chains, although the universal fixed point found in the latter system is never realized. We find, however, a new universal fixed point at intermediate disorder.
Country: EUA
Editor: American Physical Soc
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.69.214411
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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