Mott Transition and Transport Crossovers in the Organic Compound κ − ( B E D T − T T F ) 2 C u [ N ( C N ) 2 ] C l - Université de Tours Access content directly
Journal Articles Physical Review Letters Year : 2003

Mott Transition and Transport Crossovers in the Organic Compound κ − ( B E D T − T T F ) 2 C u [ N ( C N ) 2 ] C l

Abstract

We have performed in-plane transport measurements on the two-dimensional organic salt-BEDT-TTF† 2 Cu‰NCN† 2 ŠCl. A variable (gas) pressure technique allows for a detailed study of the changes in conductivity through the insulator-to-metal transition. We identify four different transport regimes as a function of pressure and temperature (corresponding to insulating, semiconducting,''bad metal,'' and strongly correlated Fermi-liquid behaviors). Marked hysteresis is found in the transition region, which displays complex physics that we attribute to strong spatial inhomogeneities. Away from the critical region, good agreement is found with a dynamical mean-field calculation of transport properties using the numerical renormalization group technique.
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Dates and versions

hal-01870016 , version 1 (07-09-2018)

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P. Limelette, P. Wzietek, S. Florens, A. Georges, T. A Costi, et al.. Mott Transition and Transport Crossovers in the Organic Compound κ − ( B E D T − T T F ) 2 C u [ N ( C N ) 2 ] C l. Physical Review Letters, 2003, 91 (1), pp.016401. ⟨10.1103/physrevlett.91.016401⟩. ⟨hal-01870016⟩
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