2006 Volume 75 Issue 5 Pages 051007
One of the clear manifestations of electron correlation in condensed matter is metal–insulator (MI) transition. The organic conductors κ-(ET)2X and (DCNQI)2M are contrasting textbook materials exhibiting correlation-induced MI transition in a single-π band with half filling and a π–d hybrid multiband with tunable band filling, respectively. By comparing these two systems, we learn prototypical manifestations of electron correlation in purely electronic and lattice-coupled manners.
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