Exotic physical properties in metallic perovskite LaRuO3: Strong evidence for Hund metal

The Hund's coupling rule is of fundamental importance in atomic physics. It also plays a key role in the determination of physical properties in strongly correlated electron systems where the Fermi energy lies in multiple bands. We report a thorough investigation of a rarely studied 4d perovskite oxide LaRuO3 by a suite of measurements including transport, magnetization, specific heat, thermoelectric power, thermal conductivity, and neutron and x-ray diffraction. Our results are consistent with theoretical predictions, which makes LaRuO3 an exemplary Hund metal.

Automated summary

The Hund's coupling rule is fundamentally important in atomic physics and plays a crucial role in determining the physical properties of strongly correlated electron systems. By conducting various measurements on the rarely studied 4d perovskite oxide LaRuO3, including transport, magnetization, specific heat, thermoelectric power, thermal conductivity, and neutron and x-ray diffraction, our results confirm the theoretical predictions, establishing LaRuO3 as an exemplary Hund metal.