Specific heat of the organic metal bis(tetrathiotetracene) tri-iodide from 20 to 100 K, the vicinity of the metal-nonmetal phase transition

摘要: Specific-heat measurements on pressed pellet samples of highly disordered bis(tetrathiotetracene) tri-iodide (TT${\mathrm{T}}_{2}$${\mathrm{I}}_{3}$) have been made from 20 to 100 K using thermal relaxation methods. An anomaly at 50 in the form a broad bump is reported which coincident with magnetic susceptibility structure and occurs approximately 25 above anomalies electrical optical behavior. The specific-heat discontinuity consistent mean-field model for Peierls phase transition correction fluctuations.