Itinerancy effects on spin correlations in one-dimensional Mott insulators
We consider spin correlations in the one-dimensional (1D) half-filled repulsive Hubbard model. For very large values of the on-site repulsion U the spin correlations are dominated by virtual hopping processes of electrons and are described in terms of a spin-1/2 Heisenberg chain. As U is decreased r...
| Autori principali: | , , |
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| Natura: | Journal article |
| Lingua: | English |
| Pubblicazione: |
2005
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