2003/01/27 by Patrice Limelette, P. Limelette, P. Wzietek +12 · 4 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Electrical resistivity and conductivity #Hysteresis #Magnetism in coordination complexes #Materials science #Mathematical physics #Metal–insulator transition #Organic and Molecular Conductors Research #Physics #Quantum and electron transport phenomena #Quantum mechanics #Renormalization group #Thermodynamics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.91.016401
published as Phys. Rev. Lett. 91, 016401 (2003) · 4 pages, 6 figures
arxiv created 2003/01/27 · openalex publication_date 2003/07/02 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We have performed in-plane transport measurements on the two-dimensional organic salt \ensuremathκ\mathrm\text\ensuremath-(BEDT\mathrm\text\ensuremath-TTF)2Cu[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, 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.