Lattice dependence of saturated ferromagnetism in the Hubbard model

Details Lattice dependence of saturated ferromagnetism in the Hubbard model Lattice dependence of saturated ferromagnetism in the Hubbard model

1997-07-28

arxiv.org/abs/cond-mat/9707286v2

Phys. Rev. B 56, 13960 (1997)

Physics

Condensed Matter

Strongly Correlated Electrons

Revtex, 18 pages with 18 figures, 7 pages appendices, section on bcc lattice added

Scientific paper

10.1103/PhysRevB.56.13960

We investigate the instability of the saturated ferromagnetic ground state (Nagaoka state) in the Hubbard model on various lattices in dimensions d=2 and d=3. A variational resolvent approach is developed for the Nagaoka instability both for U = infinity and for U < infinity which can easily be evaluated in the thermodynamic limit on all common lattices. Our results significantly improve former variational bounds for a possible Nagaoka regime in the ground state phase diagram of the Hubbard model. We show that a pronounced particle-hole asymmetry in the density of states and a diverging density of states at the lower band edge are the most important features in order to stabilize Nagaoka ferromagnetism, particularly in the low density limit.

Affiliated with

Also associated with

No associations

Rating

Lattice dependence of saturated ferromagnetism in the Hubbard model 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 Lattice dependence of saturated ferromagnetism in the Hubbard model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lattice dependence of saturated ferromagnetism in the Hubbard model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-287014