Journal article

Effective Hamiltonian for a half-filled asymmetric ionic Hubbard chain with alternating on-site interaction

    06.01.2016
Published in:
  • International Journal of Modern Physics B. - 2016, vol. 30, no. 3, p. 1550260
English We derive an effective spin Hamiltonian for the one-dimensional half-filled asymmetric ionic Hubbard model (IHM) with alternating on-site interaction in the limit of strong repulsion. It is shown that the effective Hamiltonian is that of a spin S = 1/2 anisotropic XXZ Heisenberg chain with alternating next-nearest-neighbor (NNN) and three-spin couplings in the presence of a uniform and a staggered magnetic field.
Faculty
Faculté des sciences
Department
Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/304884
Statistics

Document views: 8 File downloads:
  • men_ehh.pdf: 1