Ferromagnetism in the Hubbard model on the square lattice: Improved instability criterion for the Nagaoka state

Details Ferromagnetism in the Hubbard model on the square lattice: Improved instability criterion for the Nagaoka state Ferromagnetism in the Hubbard model on the square lattice: Improved instability criterion for the Nagaoka state

1995-12-08

arxiv.org/abs/cond-mat/9512060v1

Annalen der Physik 5, 148 (1996)

Physics

Condensed Matter

10 pages + 1 figure, submitted as uuencoded compressed ps-file, to be published in Annalen der Physik

Scientific paper

The instability of the fully polarized ferromagnetic state (Nagaoka state) with respect to single spin flips is re-examined for the Hubbard model on the square lattice with a large family of variational wave functions which include correlation effects of the majority spins in the vicinity of the flipped spin. We find a critical hole density of $\delta_{cr} = 0.251$ for $U = \infty$ and a critical coupling of $U_{cr} = 77.7 t$. Both values improve previous variational results considerably.

Affiliated with

Also associated with

No associations

Rating

Ferromagnetism in the Hubbard model on the square lattice: Improved instability criterion for the Nagaoka state 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 Ferromagnetism in the Hubbard model on the square lattice: Improved instability criterion for the Nagaoka state, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ferromagnetism in the Hubbard model on the square lattice: Improved instability criterion for the Nagaoka state will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-632914