Scaling studies of highly disordered spin-1/2 Antiferromagnetic Systems

R. N. Bhatt, P. A. Lee

Research output: Contribution to journalArticlepeer-review

391 Scopus citations


A numerical method is developed to study the scaling of distribution of couplings of highly random antiferromagnetic Ising and quantum Heisenberg spin-1/2 systems. The method shows how freezing into inert local singlets prevents ordering down to temperatures well below the median nearest-neighbor coupling or bare exchange percolation threshold in positionally disordered systems with Heisenberg exchange varying exponentially with distance (e.g., doped semiconductors, quasi one-dimensional salts). This is contrasted with the Ising system.

Original languageEnglish (US)
Pages (from-to)344-347
Number of pages4
JournalPhysical review letters
Issue number5
StatePublished - 1982
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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