Continuous Mott Transition in a Two-Dimensional Hubbard Model
Abstract
We investigate nonmagnetic metal-insulator transition in the 1/5-depleted square lattice Hubbard model at half-filling within the 8-site cellular dynamical mean field theory. We find that a metal-insulator transition without any signatures of the first order transition, a continuous Mott transition, takes place in a certain range of parameters. The nature of the continuous Mott transition is nothing but a Lifshitz transition driven by the on-site Coulomb interaction. The renormalized matrix elements of hoppings and the spin-spin correlation functions reveal that physics of this transition is strong enhancement of the dimerization due to the non-local effects of electron-electron interaction.
Cite
@article{arxiv.1403.1743,
title = {Continuous Mott Transition in a Two-Dimensional Hubbard Model},
author = {Yuki Yanagi and Kazuo Ueda},
journal= {arXiv preprint arXiv:1403.1743},
year = {2014}
}
Comments
6 pages, 6 figures, text and figures have been revised, published in Phys. Rev. B