Nov 19, 2002
Deconfinement and Bechgaard salts
Thierry Giamarchi, Univ. Geneva
The Bechgaard salts were the first examples of organic superconductors. In
addition to the superconducting phase these compounds exhibit a host of
other phases, among them A Mott insulating one. Their structure is made of
weakly coupled one dimensional conducting chains, and therefore poses very
challenging problems to the theorist. Indeed these compounds can exhibit a
dimensional crossover between a one dimensional high temperature phase,
where interaction effects are dominant, towards a more conventional fermi
liquid phase at low temperature.
I will review some of the physical properties of these systems and the
experimental puzzles they present.
I will then discuss our recent studies of the Mott insulating phase and of
the dimensional crossover.
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