Variationnal study of ferromagnetism in the t1-t2 Hubbard chain

Abstract

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 $n\to 1$.

5 pages, LateX and 1 postscript figure. To appear in Physica B

References in corpus (4)

• Ferromagnetism in the Hubbard Model-- Examples from Models with Degenerate Single-Electron Ground States
• Ferromagnetism in Hubbard Models
• Ferromagnetism in Hubbard Models: Low Density Route
• Low density ferromagnetism in the Hubbard model

Cited by in corpus (2)

• Ferromagnetic transition and phase diagram of the one-dimensional Hubbard model with next-nearest-neighbor hopping
• Phase diagram of the one-dimensional Hubbard model with next-nearest-neighbor hopping