Exotic electron-electron interactions found unnecessary for conduction in nickelates

Some metal oxides, such as nickelates, have a tuneable resistivity, which makes them an interesting material for adaptable electronics and cognitive computing. These materials can change their nature from metallic to insulating. How exactly this metal-insulator transition takes place is a topic of great interest in condensed matter physics. However, even the metallic behavior in nickelates seems unusual. Scientists from the University of Groningen, together with colleagues from Spain, have now f...