Spectral-weight function of the ionic Hubbard model

Details Spectral-weight function of the ionic Hubbard model Spectral-weight function of the ionic Hubbard model

2002-10-21

arxiv.org/abs/cond-mat/0210462v1

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

The one-electron spectral-weight function of the half-filled ionic Hubbard model is calculated by means of Quantum Monte Carlo. A metallic regimen occurs between two values of the coupling constant (Hubbard U) U1 < U2 . The system is a band insulator below U1, and an increasingly antiferromagnetic (AF) insulator above U2 evolving into a Mott insulator as U tends to infinity . The intermediate regimen which is both AF and dimerized, is caused by a two-peak structure at k = 0,5 pi (the Fermi surface). As U increases both peaks approach each other, overlap, and separate again, the system becoming metallic in the overlap region.

Affiliated with

Also associated with

No associations

Rating

Spectral-weight function of the ionic 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 Spectral-weight function of the ionic Hubbard model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectral-weight function of the ionic Hubbard model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-355472