Answers are grounded in this paper and cite their sources.
Measurements of the thermopower of the organic conductor tetrathiofulvalinium tetracyanoquinodimethane have been made in the region 10-300^∘{}K. At high temperatures (T>140^∘K) the samples are metallic showing increased electron correlations as the temperature is lowered to about 56^∘{}K. At this point the thermopower is zero and a discontinuity marks the transition to the insulating state.
No takes yet. Share an insight, caveat, or question.
Chaikin et al. (1973) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: