Effective Hamiltonian for a Half-filled Hubbard Chain with Alternating On-site Interactions
Journal article, 2004

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-neighbour (nnn) exchange.


Paata Kakashvili

Chalmers, Department of Theoretical Physics and Mechanics, Solid State Theory

George Japaridze

Journal of Physics: Condensed Matter

Vol. 16 32 5815-5823

Subject Categories

Condensed Matter Physics

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