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The European Physical Journal B

Renormalization group phase boundary of the three-dimensional bond-dilute Ising ferromagnet

Nai‐Cheng Chao, Georges Schwachheim, Constantino Tsallis

Published Dec 1, 1981• 5 citations
Publisher
DOI
10.1007/bf01292797

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arXiv:cond-mat/0002089•Journal of the Physical Society of Japan•Mar 15, 2000•47 citations
The fixed-point structure of three-dimensional bond-disordered Ising models is investigated using the numerical domain-wall renormalization-group method. It is found that, in the +/-J Ising model, there exists a non-trivial fixed point along the phase boundary between the paramagnetic and ferromagnetic phases. The fixed-point Hamiltonian of the +/-J model numerically coincides with that of the unfrustrated random Ising models, strongly suggesting that both belong to the same universality class. Another fixed point corresponding to the multicritical point is also found in the +/-J model. Critical properties associated with the fixed point are qualitatively consistent with theoretical predictions.