Metal–insulator phase transition in TTT2I3 affected by iodine concentration

Abstract

It is found that the iodine content in the complex TTT2I3 may be varied from 1.5 to ≈ 1.55 atoms per molecule of TTT. Increasing of the iodine concentration in the complex gives rise to an increase in the degree of incommensurability of the TTT and the I sublattices and also the degree of disordering associated with losing the correlation in arrangement of different one-dimensionally ordered iodine chains. It results in the change of conducting and magnetic properties of the complex. The temperature of the conductivity maximum moves down as the iodine concentration is increased in the complex, and the maximum is the higher, the lower its temperature. It is found that a phase transition of the metal-insulator type exists in TTT2I3 with a transition temperature depending on the iodine content. [Russian Text Ignored].