CORRELATED REDUCED TRANSFER MATRIX APPROACH FOR ISING MODEL

Kaya T.

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, cilt.26, sa.14, 2012 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 26 Sayı: 14
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1142/s0217979212500853
  • Dergi Adı: INTERNATIONAL JOURNAL OF MODERN PHYSICS B
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Classical statistical mechanics, classical spin models, lattice theory and statistics, COHERENT-ANOMALY METHOD, EFFECTIVE-FIELD-THEORY, RENORMALIZATION-GROUP, FERROMAGNET, STATISTICS, CRYSTALS
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

In this paper we present a simple approximate transfer matrix method for 2D and 3D hyper cubic nearest neighbor Ising models with various coordination number z to calculate the corresponding critical coupling strengths K-c. The critical coupling strengths of the Ising ferromagnets are obtained quite accurately by simple improvements over the self-consistent correlated field (SCCF) approximation. The important physical effect included in this work is some of the fluctuation effects of the systems by the help of a reduced transfer matrix method. When used in combination with the accuracy of the average magnetization obtained from the SCCF approximation, this reduced transfer matrix method leads to estimate of K-c more accurate than those obtained from the Bethe-Peierls-Weiss approximation and also SCCF approximation. Therefore, we believe that the approach we refer to as the correlated reduced transfer matrix method is potentially very useful scheme for obtaining approximate values of the critical coupling strengths of the Ising models with a mathematically easy meaner.