Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2001-03-22
Physics
Condensed Matter
Strongly Correlated Electrons
10 pages, 8 figures
Scientific paper
The one-electron density of states for the half-filled Hubbard model on a triangular lattice is studied as a function of both temperature and Hubbard U using Quantum Monte Carlo. We find three regimes: (1) a strong-coupling Mott-Hubbard regime, characterized by a gap which persists even at high temperatures; (2) a weak-coupling paramagnetic regime, characterized by the absence of a pseudogap at any finite temperature; and (3) an intermediate-coupling (spiral) spin-density-wave regime, characterized by a pseudogap which appears when U is increased beyond a critical (temperature dependent) value. The behavior of the sqrt(3) times sqrt{3} adlayer structures on fourth-group semiconductor surfaces is briefly commented upon in the light of the above discussion.
Lopez Sancho J. M.
Refolio M. C.
Rubio Julio
No associations
LandOfFree
The one-electron Green's function of the half-filled Hubbard model on a triangular lattice 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 The one-electron Green's function of the half-filled Hubbard model on a triangular lattice, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The one-electron Green's function of the half-filled Hubbard model on a triangular lattice will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-277677