Mott transition in the organic compound κ-(BEDT-TTF) 2 Cu[ N(CN) 2 ] Cl: An evidence for two energy scales

P. Limelette , P. Wzietek (1) , S. Florens (2) , A. Georges (3) , C. Pasquier (4) , D. Jerome (5) , C. Meziere (6) , P. Batail (6)

1 LPS - Laboratoire de Physique des Solides
2 LPTENS - Laboratoire de Physique Théorique de l'ENS [École Normale Supérieure]
3 LPTENS - Laboratoire de Physique Théorique de l'ENS [École Normale Supérieure]
4 Unité de Science du Sol
5 EA4136 - Handicap et système nerveux :Action, communication, interaction: rétablissement de la fonction et de la participation [Bordeaux]
6 CIMMA - Chimie, Ingénierie Moléculaire et Matériaux d'Angers

We We have performed in-plane transport measurements on the two-dimensional organic salt κ-(BEDT-TTF) 2 Cu[N(CN) 2 ]Cl. 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, semi-conducting,''bad metal'', and strongly correlated Fermi liquid behaviours.

Domaines: Electrons fortement corrélés [cond-mat.str-el]

P. Limelette, P. Wzietek, S. Florens, A. Georges, C. Pasquier, et al.. Mott transition in the organic compound κ-(BEDT-TTF) 2 Cu[ N(CN) 2 ] Cl: An evidence for two energy scales. Journal de Physique IV Proceedings, 2004, 114, pp.331 - 332. ⟨10.1051/jp4:2004114074⟩. ⟨hal-01870048⟩