J. Phys. IV France 114 (2004) 23
Dimensional crossover and deconfinement in Bechgaard saltsT. Giamarchi1, S. Biermann2, A. Georges2 and A. Lichtenstein3
1 University of Geneva, 24 Quai Ernest Ansermet, 1211 Geneva, Switzerland
2 LPTENS-CNRS UMR 8549, 24 rue Lhomond, 75231 Paris Cedex 05, France
3 University of Nijmegen, 6525 ED Nijmegen, The Netherlands
The Bechgaard salts are made of weakly coupled one dimensional chains. This particular structure gives the possibility to observe in these systems a dimensional crossover between a high temperature (or high energy) one dimensional phase and a two or three dimensional system. Since the filling of the chains is commensurate the system thus undergoes a deconfinement transition from a one dimensional Mott insulator to a two (or three) dimensional metal. Such a transition has of course a strong impact on the physical properties of these compounds, and is directly seen in transport measurements.
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