Universality of Liquid-Gas Mott Transitions at Finite Temperatures

Stefanos Papanikolaou, Rafael M. Fernandes, Eduardo Fradkin, Philip W. Phillips, Joerg Schmalian, and Rastko Sknepnek
Phys. Rev. Lett. 100, 026408 – Published 18 January 2008

Abstract

We explain, in a consistent manner, the set of seemingly conflicting experiments on the finite temperature Mott critical point, and demonstrate that the Mott transition is in the Ising universality class. We show that, even though the thermodynamic behavior of the system near such critical point is described by an Ising order parameter, the global conductivity can depend on other singular observables and, in particular, on the energy density. Finally, we show that in the presence of weak disorder the dimensionality of the system has crucial effects on the size of the critical region that is probed experimentally.

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  • Received 7 October 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.026408

©2008 American Physical Society

Authors & Affiliations

Stefanos Papanikolaou1, Rafael M. Fernandes2,3,4, Eduardo Fradkin1, Philip W. Phillips1, Joerg Schmalian2, and Rastko Sknepnek2

  • 1Department of Physics, University of Illinois at Urbana-Champaign, 1110 W. Green St., Urbana, Illinois 61801-3080, USA
  • 2Ames Laboratory and Department of Physics and Astronomy, Iowa State University Ames, Iowa 50011, USA
  • 3Instituto de Física “Gleb Wataghin”, Universidade Estadual de Campinas, Campinas, SP, Brazil
  • 4Laboratório Nacional de Luz Síncrotron, Campinas, SP, Brazil

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Issue

Vol. 100, Iss. 2 — 18 January 2008

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