Mott transition in the organic compound $\kappa$-(BEDT-TTF)$_{2}$ Cu[ N(CN)$_{ 2}$] Cl: An evidence for two energy scales

P. Limelette; P. Wzietek; S. Florens; A. Georges; C. Pasquier; D. Jérome; C. Mézière; P. Batail

doi:doi:10.1051/jp4:2004114074

Numéro		J. Phys. IV France Volume 114, April 2004


Page(s)		331 - 332
DOI		https://doi.org/10.1051/jp4:2004114074

J. Phys. IV France 114 (2004) 331
DOI: 10.1051/jp4:2004114074

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

P. Limelette^{1, 1}, P. Wzietek¹, S. Florens², A. Georges^{1, 2}, C. Pasquier¹, D. Jérome¹, C. Mézière³ and P. Batail³

¹ Laboratoire de Physique des Solides (CNRS, U.R.A. 8502), Bât. 510, Université de Paris-Sud, 91405 Orsay, France
² LPT-École Normale Supérieure, (CNRS-UMR 8549), 24 rue Lhomond, 75231 Paris Cedex 05, France
³ Laboratoire Chimie Inorganique, Matériaux et Interfaces (CIMI), FRE 2447 CNRS, Université d'Angers, 49045 Angers, France

Abstract
We We have performed in-plane transport measurements on the two-dimensional organic salt $\kappa$ -(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. Key words. Mott transition - strongly correlated material - organic salt - high pressure.

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

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