Effective Hamiltonian for a half-filled tetramerized ionic-Hubbard chain
M. Menteshashvili, N. Chachava, G. I. Japaridze
TL;DR
This paper derives an effective spin Hamiltonian for a half-filled tetramerized ionic-Hubbard chain, revealing low-energy magnetic properties in the strong repulsion limit.
Contribution
It introduces a new effective Hamiltonian specifically for the tetramerized ionic-Hubbard model at half-filling in the strong interaction regime.
Findings
Effective Hamiltonian is a spin S=1/2 Heisenberg model with alternating exchange.
Describes low-energy spin sector of the tetramerized ionic-Hubbard chain.
Provides insights into magnetic interactions in strongly correlated systems.
Abstract
We derive an effective spin Hamiltonian for the one-dimensional half-filled tetramerized ionic-Hubbard model in the limit of strong on-site repulsion. We show that the effective Hamiltonian which describes the low-energy spin sector of the model is a spin S=1/2 Heisenberg Hamiltonian with alternating nearest-neighbour exchange.
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Taxonomy
TopicsAlgebraic structures and combinatorial models · Magnetism in coordination complexes · Organic and Molecular Conductors Research