Effective Hamiltonian for a half-filled asymmetric ionic Hubbard chain with alternating on-site interaction
- Grusha, I. Faculty of Natural Sciences and Engineering, Ilia State University, Tbilisi, Georgia
- Menteshashvili, Mikheil Department of Physics, University of Fribourg, Switzerland
- Japaridze, Giorgi I. Andronikashvili Institute of Physics, Tbilisi, Georgia
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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 et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 260591
- DOI 10.1142/S0217979215502604
- Persistent URL
- https://folia.unifr.ch/unifr/documents/304884
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