Effective Hamiltonian for a Half-filled Hubbard Chain with Alternating On-site Interactions
Artikel i vetenskaplig tidskrift, 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.

Författare

Paata Kakashvili

Chalmers, Institutionen för teoretisk fysik och mekanik, Fasta tillståndets teori

George Japaridze

Journal of Physics: Condensed Matter

Vol. 16 5815-5823

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Den kondenserade materiens fysik