Metal-insulator transition in the organic metal (TTM-TTP)I-3 with a one-dimensional half-filled band

The title 1:1 composition organic conductor, with a highly one-dimensional half-filled energy band, exhibits metallic conductivity down to T-MI approximate to 160 K, but the spin susceptibility follows the one-dimensional Heisenberg model from room temperature to 2 K, without any anomaly at TMI. The insulating state is regarded as a Mott insulator. The small U, related to the extended molecular structure, gives rise to the small charge gap and the high-temperature metallic conduction.