Influence of rare regions on quantum phase transition in antiferromagnets with hidden degrees of freedom

Details Influence of rare regions on quantum phase transition in antiferromagnets with hidden degrees of freedom Influence of rare regions on quantum phase transition in antiferromagnets with hidden degrees of freedom

2000-01-15

arxiv.org/abs/cond-mat/0001214v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

12 pages, latex, 4 figures; to appear in Physica A

Scientific paper

The effects of rare regions on the critical properties of quantum
antiferromagnets with hidden degrees of freedom within the renormalization
group is discussed. It is shown that for ``constrained'' systems the stability
range on the phase diagram remains the same as in the mean-field theory while
for ``unconstrained'' systems the stability range is effectively decreased.

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