For announcing

[CM ICTP - Trieste]

CONDENSED MATTER AND STATISTICAL PHYSICS SECTION
	
INFORMAL SEMINAR on  Disorder and strong electron correlations




Thursday, 7 December    -    11:00 a.m.



Lecture Room 'C',  Main Bldg.- terrace level



T. GIAMARCHI  ( University of Geneva )


" Deconfinement in organic superconductors "


Abstract

Organic superconductors are systems made of coupled one dimensional 
chains.  These compounds exibit thus a very interesting transition 
between a one dimensional regime, where interactions are crucial and 
the system is described by a Luttinger liquid or a Mott insulator, to a 
three dimensional one where a more conventional Fermi liquid behavior 
is expected.  I will review this physics, and show how it can be 
analyzed both using analytical techniques, and also numerical 
techniques such as dynamical mean field approach looking at a single 
chain imbedded in a bath (chain-DMFT).  Using these techniques we could 
investigate the various properties across this dimensional transition.  
Of special interest is the shape of the Fermi surface and how one can 
go from the gapped Mott insulator to recover a standard Fermi surface 
when the system is back to Fermi liquid behavior.