Loading...

Factorized ground state for a general class of ferrimagnets

Rezai, M ; Sharif University of Technology | 2010

56 Viewed
  1. Type of Document: Article
  2. DOI: 10.1103/PhysRevB.81.060401
  3. Publisher: 2010
  4. Abstract:
  5. We have found the exact (factorized) ground state of a general class of ferrimagnets in the presence of a magnetic field which includes the anisotropic and long-range interactions for arbitrary dimensional space. In particular cases our model represents many spin chains with bond alternation of antiferromagnetic-ferromagnetic coupling, ferrimagnetic spin ladders, and also homogeneous spin- s models. The factorized ground state is a product of single-particle kets on a bipartite lattice composed of two different spins (ρ,σ) which is characterized by two angles, a biangle state. The spin-wave analysis around the exact ground state shows two branch of excitations which are the origin of two dynamics of the model. The signature of these dynamics is addressed as a peak and a broaden bump in the specific heat
  6. Keywords:
  8. Source: Physical Review B - Condensed Matter and Materials Physics ; Volume 81, Issue 6 , February , 2010 ; 10980121 (ISSN)
  9. URL: http://journals.aps.org/prb/abstract/10.1103/PhysRevB.81.060401