Trilayer Bethe lattices in the form of spin-(1/2,3/2,1/2)


ALBAYRAK E. , Ak F.

PHYSICA B-CONDENSED MATTER, cilt.407, ss.2642-2649, 2012 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 407 Konu: 13
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.physb.2012.04.016
  • Dergi Adı: PHYSICA B-CONDENSED MATTER
  • Sayfa Sayıları: ss.2642-2649

Özet

The critical behaviors of the trilayer Bethe lattice in the form of spin-(1/2,3/2,1/2) with the exterior two layers consisting of spin-1/2 and the interior one having only spin-3/2 Ising spins are studied in terms of the recursion relations with either ferromagnetic or antiferromagnetic bilinear exchange interactions between the nearest-neighbor spins. The ground-state phase diagrams are calculated and it is found that the model presents six different ground state phase configurations. The thermal variations of the order-parameter and free energy are investigated, therefore, topologically different phase diagrams of the model are obtained. It is found that the model exhibits second- and first-order phase transitions, tricritical and bicritical points for the values of the coordination numbers q = 3, 4 and 6 and, the reentrant behavior for q = 4 and 6, respectively. (C) 2012 Elsevier B.V. All rights reserved.