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Quantum Monte Carlo study of spin 12 ± Jz chains

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  • Yokozeki, Wataru
  • Shiiki, Kazuo
  • Fukuchi, Mitsuru

Abstract

Disorder of anisotropy is introduced into spin 12 quantum XXZ chains. This model, which is refered as the spin 12 ± Jz chain, is studied by the quantum Monte Carlo method. It displays the critical phenomena of the x−y phase, though the critical exponents γ, η and ν must be corrected. However, the antiferromagnetic alternating spin chains show no critical phenomena. It is found that the susceptibility along the z axis and averaged zz pair spin correlation functions of alternating spin chains show obviously different behavior from those of ±Jz chains.

Suggested Citation

  • Yokozeki, Wataru & Shiiki, Kazuo & Fukuchi, Mitsuru, 1996. "Quantum Monte Carlo study of spin 12 ± Jz chains," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 223(1), pages 214-226.
    • Handle: RePEc:eee:phsmap:v:223:y:1996:i:1:p:214-226
    DOI: 10.1016/0378-4371(95)00290-1
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    1. Karin Peschel, 1975. "Integration And The Spatial Distribution Of Economic Activity," Papers in Regional Science, Wiley Blackwell, vol. 34(1), pages 27-42, January.
    2. Kulshreshtha, S. N. & Tewari, D. D. & Lal, Jagdish & Singh, Katar, 1982. "Determinants of Sugarcane Acreage Fluctuations in Uttar Pradesh," Indian Journal of Agricultural Economics, Indian Society of Agricultural Economics, vol. 37(2), April.
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