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