Electrical properties of chain and sheet mercury compounds

Abstract

The electrical resistivity of the chain compounds Hg 3-δ AsF 6 and Hg 3-δ SbF 6 decreases with decreasing temperature. It is shown that the temperature dependence of the resistivity of Hg 3-δ SbF 6 depends on the rate that a sample is cooled from room temperature to liquid helium temperature. The electrical resistivity of the layered compounds Hg 3 TaF 6 and Hg 3 NbF 6 is metallic from 300 to 1.4 K. The induced torque, de Haas-van Alphen effect and resistivity of the chain compounds are related to the cylindrical Fermi surface model. Superconductivity of the compounds is discussed.