arxiv: cond-mat/0405048 · v1 · submitted 2004-05-04 · ❄️ cond-mat.str-el

Effective Hamiltonian for a Half-filled Hubbard Chain with Alternating On-site Interactions

Paata Kakashvili , George I. Japaridze This is my paper

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keywords effectivehamiltonianalternatingchainhalf-filledhubbardon-sitespin

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We derive an effective spin Hamiltonian for the one-dimensional half-filled Alternating Hubbard model in the limit of strong on-site repulsion. We show that the effective Hamiltonian is a spin $S=1/2$ Heisenberg chain with asymmetric next-nearest-neighbor (nnn) exchange.

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Effective Hamiltonian for a Half-filled Hubbard Chain with Alternating On-site Interactions

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