Speaker
Description
The rhenium (Re)-based compounds are difficult to synthesize owing to the element’s high melting temperature and low solubility into solid solution. In this talk, we will present an anomalous transport property observed in single crystal Re3Ge7. In zero field, the temperature dependence of electrical resistivity sharply increases below a phase transition temperature Tc = 58.5 K, showing a metal-to-insulator-like transition. Analysis of the Hall coefficient measurements indicates that the carrier density is 0.04 per formula unit at 300 K and drops by two orders of magnitude below Tc. When magnetic field is applied, the temperature dependence of resistivity develops a maximum around 30 K, deviating from an ordinary metallic behaviour. At low temperatures, the Shubnikov-de Hass quantum oscillations are detected on top of the linear field dependence of magnetoresistance.
