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Variationnal study of ferromagnetism in the t1-t2 Hubbard chain by Daul, S.; Pieri, P.; Dzierzawa, M.; Baeriswyl, D.; Fazakas, P. is a scholarly article available to read on EtoBox.

What is Variationnal study of ferromagnetism in the t1-t2 Hubbard chain about?

A one-dimensional Hubbard model with nearest and (negative) next-nearest neighbour hopping is studied variationally. This allows to exclude saturated ferromagnetism for $U < U_c$. The variational boundary $U_c (n)$ has a minimum at a ``critical density'' $n_c$ and diverges for $n \rightarrow 1$.

Author

Daul, S.; Pieri, P.; Dzierzawa, M.; Baeriswyl, D.; Fazakas, P.

Published

1996

Language

EN