Spinful fermionic ladders at incommensurate filling: Phase diagram, local perturbations, and ionic potentials
Strongly Correlated Electrons
2015-06-16 v1 Mesoscale and Nanoscale Physics
Abstract
We study the effect of external potential on transport properties of the fermionic two-leg ladder model. The response of the system to a local perturbation is strongly dependent on the ground state properties of the system and especially on the dominant correlations. We categorise all phases and transitions in the model (for incommensurate filling) and introduce "hopping-driven transitions" that the system undergoes as the inter-chain hopping is increased from zero. We also describe the response of the system to an ionic potential. The physics of this effect is similar to that of the single impurity, except that the ionic potential can affect the bulk properties of the system and in particular induce true long range order.
Keywords
Cite
@article{arxiv.1306.3382,
title = {Spinful fermionic ladders at incommensurate filling: Phase diagram, local perturbations, and ionic potentials},
author = {Sam T. Carr and Boris N. Narozhny and Alexander A. Nersesyan},
journal= {arXiv preprint arXiv:1306.3382},
year = {2015}
}
Comments
60 pages