Universality of liquid-gas Mott transitions at finite temperatures

TitleUniversality of liquid-gas Mott transitions at finite temperatures
Publication TypeJournal Article
Year of Publication2008
AuthorsPapanikolaou S, Fernandes RM, Fradkin E, Phillips PW, Schmalian J, Sknepnek R
Journal TitlePhysical Review Letters
Volume100
Pages026408
Date PublishedJan
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberISI:000252471200061
Keywords1ST-ORDER PHASE-TRANSITIONS, CRITICAL-BEHAVIOR, METAL-INSULATOR-TRANSITION, systems
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.

DOI10.1103/PhysRevLett.100.026408
Alternate JournalPhys. Rev. Lett.