Universality class of the Mott transition

M. Abdel-Jawad, R. Kato, I. Watanabe, N. Tajima, Yasuyuki Ishii

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Abstract

Pressure dependence of the conductivity and thermoelectric power is measured through the Mott transition in the layer organic conductor EtMe3P[Pd(dmit)2]2. The critical behavior of the thermoelectric effect provides a clear and objective determination of the Mott-Hubbard transition during the isothermal pressure sweep. Above the critical end point, the metal-insulator crossing, determined by the thermoelectric effect minimum value, is not found to coincide with the maximum of the derivative of the conductivity as a function of pressure. We show that the critical exponents of the Mott-Hubbard transition fall within the Ising universality class regardless of the dimensionality of the system.

Original languageEnglish
Article number106401
JournalPhysical Review Letters
Volume114
Issue number10
DOIs
Publication statusPublished - 2015 Mar 11

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Abdel-Jawad, M., Kato, R., Watanabe, I., Tajima, N., & Ishii, Y. (2015). Universality class of the Mott transition. Physical Review Letters, 114(10), [106401]. https://doi.org/10.1103/PhysRevLett.114.106401