Bond diluted anisotropic quantum Heisenberg model

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AKINCI Ü.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, cilt.343, ss.69-75, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 343
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1016/j.jmmm.2013.04.073
  • Dergi Adı: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.69-75
  • Anahtar Kelimeler: Quantum anisotropic Heisenberg model, Bond dilution, Bond percolation threshold, EFFECTIVE-FIELD-THEORY, ISING-MODEL, SPIN-GLASS, FERROMAGNET
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Effects of the bond dilution on the critical temperatures, phase diagrams and the magnetization behaviors of the isotropic and anisotropic quantum Heisenberg model have been investigated in detail. For the isotropic case, bond percolation threshold values have been determined for several numbers of two (2D) and three (3D) dimensional lattices. In order to investigate the effect of the anisotropy in the exchange interaction on the results obtained for the isotropic model, a detailed investigation has been made on a honeycomb lattice. Some interesting results, such as second order reentrant phenomena in the phase diagrams have been found. (C) 2013 Elsevier B.V All rights reserved.