Numerical studies of Ising spin glasses in two, three, and four dimensions

R. N. Bhatt, A. P. Young

Research output: Contribution to journalArticle

275 Scopus citations

Abstract

We present the results of numerical simulations on Ising spin glasses in zero magnetic field with nearest-neighbor interactions on hyper-cubic lattices in two, three, and four dimensions with both Gaussian and ±J bond distributions. Finite-size scaling is used to analyze the results. In two dimensions (d=2) we agree with earlier work that the transition temperature is at Tc=0, and obtain the correlation-length exponent ν, and the exponent η, at the zero-temperature transition for the ±J model. In d=3 dimensions we concentrate on results for the Gaussian distribution, since our results for the ±J distribution have been presented earlier. As expected, we find similar results for the two distributions, namely a nonzero Tc but evidence that d=3 is close to the lower critical dimension. In a four-dimensional spin glass with Gaussian bonds we find that only a modest amount of computer time is required to show that Tc is nonzero with a long-range-ordered phase below Tc. Our estimates for critical exponents in d=4 dimensions agree well with results from recent high-temperature-series expansions.

Original languageEnglish (US)
Pages (from-to)5606-5614
Number of pages9
JournalPhysical Review B
Volume37
Issue number10
DOIs
StatePublished - Jan 1 1988
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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