Abstract

Abstract Static magnetic susceptibility measurements, performed at ambient pressure on single crystals of the quasi-1D conductors TTF[ M (dmit) 2 ] 2 where M = Ni, Pd, link up to correlate the molar spin susceptibility χ s of these charge-transfer salts with successive condensations of the carriers into static charge-density waves (CDW) and with the partial densities of states (DOS) at the Fermi level derived from tight-binding band-structure calculations. In both compounds, the highest temperature CDW instability is driven by the LUMO bands of the acceptor stacks. Comparison between the room temperature χ s value and the calculated Pauli spin susceptibility shows that both compounds may be characterized by weak intramolecular repulsions U compared to the bandwidth W.

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