Date of this Version
Physical Review Letters
We present arguments, based on local gauge invariance, that the multicritical point of Ising spin-glasses should be located on a particular line of the phase diagram known as Nishimori's line [tanh(βJ)=2p−1 for the ±J distribution]. One scaling axis is along the line, and the other is along the temperature direction. This scenario is generic for any random Ising model with a Nishimori line, in any number of dimensions, if the transitions are second order. The renormalization-group fixed point located inside Nishimori's manifold is expected to control multicriticality for a wider class of models.
Le Doussal, P., & Harris, A. (1988). Location of the Ising Spin-Glass Multicritical Point on Nishimori's Line. Physical Review Letters, 61 (5), 625-628. http://dx.doi.org/10.1103/PhysRevLett.61.625
Date Posted: 20 August 2015
This document has been peer reviewed.