Vs. Yefanov et al., THERMOPOWER STUDIES OF M=TL, X=S, SE COMPOUNDS OF ET(2)MHG(XCN)(4) ORGANIC SUPERCONDUCTORS FAMILY, Physica. C, Superconductivity, 235, 1994, pp. 2465-2466
Thermopower vs temperature curves for a and c directions in the basal
plane and b direction normal to it of ET(2)TlHg(SCN)(4), ET(2)TlHg(SC
N)(2)(SeCN)(2) and ET(2)TlHg(SeCN)(4) crystals have been measured. Pha
se transition to isotropic zero thermopower magnetically ordered groun
d state is observed at 10 K in the thiocyanate salt, competing with th
e superconducting phase in the compounds. Contrary, no such anomalous
behavior is observed in selenocyanate and thioselenocyanate salts.