Department of Physics Papers

Document Type

Journal Article

Date of this Version

12-1-1988

Publication Source

Physical Review B

Volume

38

Issue

16

Start Page

11405

Last Page

11417

DOI

10.1103/PhysRevB.38.11405

Abstract

We introduce a new family of models for spin-glass systems. This family has quenched site dilution with varying strengths of local correlations and modulated ordered phases in the pure limit. The correlated dilution mimics the experimental situation in Cu-Mn, Au-Fe, and Pt-Mn. Relatively weak correlations are conjectured to be sufficient to explain the observed interactions between regions of modulated spin order and coexisting smaller ferromagnetic regions in CuMn. The models are investigated by the transmission-of-order approach, which relates the zero-temperature line of the temperature-dilution phase diagram to a family of correlated percolation models. Exact results for the correlated percolation models on the Cayley tree and simulations on the square lattice are presented. We find novel phases in which percolation occurs on some but not all sublattices.

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Date Posted: 12 August 2015

This document has been peer reviewed.