Quantum Monte Carlo Calculation of the/1-/2 Model

Tota Nakamura, Naomichi Hatano

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23 Citations (Scopus)


The Neel and collinear order parameters of the/r/2 model are calculated by the quantum Monte Carlo simulation with the reweighting method. Systems of sizes AT=4 x 4, 4 x 8 and 8 x 8 are treated. The thermodynamic quantities obtained by the size extrapolation suggest that the Neel order remains finite for a 0<0.4 and vanishes for a 0>0.6, where a is defined by J2Uu and that the collinear order remains for ce0>0.7 and vanishes for a 0<0.6. The present result is consistent with the result of the modified spin-wave calculation, conflicting with that of the naive spin-wave theory. JrJ2 model, quantum Monte Carlo method, reweighting method.

Original languageEnglish
Pages (from-to)3062-3070
Number of pages9
JournalJournal of the Physical Society of Japan
Issue number9
Publication statusPublished - 1993 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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