Abstract

Correlated quasi-1D electron gas exhibit 2kF and 4kF CDW/BOW instabilities widely observed among the organic conductors. The Bechgaard and Fabre salts exhibit mixed SDW-CDW, Anti-ferromagnetism (AF) and spin peierls (SP) ground states achieving a subtle coupling between the spin and lattice degrees of freedom. The SP and AF nature of the Fabre salts’ ground state is analyzed in relation with the presence of a high temperature 4kF CDW-ferroelectric phase transition.

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