Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2009-02-06
Physics
Condensed Matter
Strongly Correlated Electrons
13 pages, 12 figures
Scientific paper
We investigate the neutral-to-ionic insulator-insulator transition in one-dimensional materials by treating a strong-coupling effective model based on the ionic Hubbard model using the density-matrix renormalization group and finite-size scaling. The effective model, formulated in a spin-one representation, contains a single parameter. We carry out an extensive finite-size scaling analysis of the relevant gaps and susceptibilities to characterize the two zero-temperature transitions. We find that the transition from the ionic band-insulating phase to an intermediate spontaneously dimerized phase is Ising, and the transition from the dimerized phase to the Mott-insulating phase is Kosterlitz-Thouless, in agreement with the field-theory-based predictions.
Baeriswyl Dionys
Noack Reinhard M.
Tincani L.
No associations
LandOfFree
Critical properties of the band-insulator-to-Mott-insulator transition in the strong-coupling limit 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 Critical properties of the band-insulator-to-Mott-insulator transition in the strong-coupling limit of the ionic Hubbard model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Critical properties of the band-insulator-to-Mott-insulator transition in the strong-coupling limit of the ionic Hubbard model will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-251650