The one-dimensional Kondo lattice model at quarter-filling

Details The one-dimensional Kondo lattice model at quarter-filling The one-dimensional Kondo lattice model at quarter-filling

2008-09-18

arxiv.org/abs/0809.3235v1

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 5 figues, to to appear in PRB

Scientific paper

10.1103/PhysRevB.78.144406

We revisit the problem of the quarter-filled one-dimensional Kondo lattice model, for which the existence of a dimerized phase and a non-zero charge gap had been reported in Phys. Rev. Lett. \textbf{90}, 247204 (2003). Recently, some objections were raised claiming that the system is neither dimerized nor has a charge gap. In the interest of clarifying this important issue, we show that these objections are based on results obtained under conditions in which the dimer order is artificially suppressed. We use the incontrovertible dimerized phase of the Majumdar-Ghosh point of the $J_{1}-J_{2}$ Heisenberg model as a paradigm with which to illustrate this artificial suppression. Finally, by means of extremely accurate DMRG calculations, we show that the charge gap is indeed non-zero in the dimerized phase.

Affiliated with

Also associated with

No associations

Rating

The one-dimensional Kondo lattice model at quarter-filling 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-dimensional Kondo lattice model at quarter-filling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The one-dimensional Kondo lattice model at quarter-filling will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-282103