Stability of Ferromagnetism in Hubbard models on two-dimensional line graphs

Details Stability of Ferromagnetism in Hubbard models on two-dimensional line graphs Stability of Ferromagnetism in Hubbard models on two-dimensional line graphs

2006-09-06

arxiv.org/abs/cond-mat/0609142v2

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages. To be published in J. Phys. A, Math. Gen

Scientific paper

It is well known that the Hubbard model on a line graph has a flat band and ferromagnetic ground states in a certain density range. We show that for a Hubbard model on a line graph of a planar bipartite graph the ferromagnetic ground state is stable if one adds a special contribution to the kinetic energy which lifts the degeneracy of the lowest single particle state. Stability holds for sufficiently strong repulsion U. The model has extended single particle eigenstates, no degeneracy, and no band gap. It is therefore a good candidate for metallic ferromagnetism.

Affiliated with

Also associated with

No associations

Rating

Stability of Ferromagnetism in Hubbard models on two-dimensional line graphs does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Stability of Ferromagnetism in Hubbard models on two-dimensional line graphs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stability of Ferromagnetism in Hubbard models on two-dimensional line graphs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-418271