Critical and reentrant behavior of the spin quantum 1/2 anisotropic Heisenberg antiferromagnet model with Dzyaloshinskii-Moriya interaction in a longitudinal magnetic field

Parente W. E. F., Pacobahyba J. T. M., Araujo I. G., Neto M. A., de Sousa J. R., AKINCI Ü.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, cilt.355, ss.235-239, 2014 (SCI-Expanded, Scopus)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 355
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1016/j.jmmm.2013.12.041
  • Dergi Adı: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.235-239
  • Anahtar Kelimeler: Heisenberg model, Quantum systems, Dzyaloshinskii-Moriya interaction
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

In this paper we study the quantum spin-1/2 anisotropic Heisenberg antiferromagnet model in the presence of a Dzyaloshinskii-Moriya interaction (D) and a uniform longitudinal (H) magnetic held. Using the effective-held theory with a finite cluster N=2 spin (EFT-2) we calculate the phase diagrams in the H - T and D - T planes on a simple cubic lattice (z=6). We have only observed second order phase transitions for values between Delta is an element of [0, 1], where the cases were analysed: [sing (Delta = 1), anisotropic Heisenberg (Delta = 0.6) and isotropic Heisenberg (Delta = 0). Crown Copyright (C) 2014 Published by Elsevier B.V. All rights reserved.