Finite Temperature Mott Transition in Hubbard Model on Anisotropic Triangular Lattice

Takuma Ohashi, Tsutomu Momoi, Hirokazu Tsunetsugu, and Norio Kawakami
Phys. Rev. Lett. 100, 076402 – Published 20 February 2008

Abstract

We investigate the Hubbard model on the anisotropic triangular lattice by means of the cellular dynamical mean-field theory. The phase diagram determined in the Hubbard interaction versus temperature plane shows novel reentrant behavior in the Mott transition due to the competition between Fermi-liquid formation and magnetic correlations under geometrical frustration. We demonstrate that the reentrant behavior is characteristic of the Mott transition with intermediate geometrical frustration and indeed consistent with recent experimental results of organic materials.

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  • Received 3 September 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.076402

©2008 American Physical Society

Authors & Affiliations

Takuma Ohashi1,*, Tsutomu Momoi1, Hirokazu Tsunetsugu2, and Norio Kawakami3

  • 1Condensed Matter Theory Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
  • 2Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
  • 3Department of Physics, Kyoto University, Kyoto 606-8502, Japan

  • *Present address: Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.

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Vol. 100, Iss. 7 — 22 February 2008

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