Continuous Mott transition in a two-dimensional Hubbard model

Yuki Yanagi, Kazuo Ueda

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We investigate a nonmagnetic metal-insulator transition in the 1/5-depleted square lattice Hubbard model at half filling within the eight-site cellular dynamical mean field theory. We find that a metal-insulator transition without any signatures of a first-order transition, a continuous Mott transition, takes place in a certain range of parameters. The nature of the continuous Mott transition is merely a Lifshitz transition driven by the on-site Coulomb interaction. The renormalized matrix elements of hoppings and the spin-spin correlation functions reveal that the physics of this transition is a strong enhancement of the dimerization due to the nonlocal effects of the electron-electron interaction.

Original languageEnglish
Article number085113
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume90
Issue number8
DOIs
Publication statusPublished - 2014 Aug 11
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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