Giant pressure-enhancement of multiferroicity in CuBr2

This work demonstrates experimentally that the transition temperature of the type-II multiferroic CuBr${}_{2}$ shows a gigantic enhancement under pressure. The authors perform detailed structural measurements and quantitatively accurate first-principles calculations of the magnetic interactions to explain the high transition temperature, the enhancement mechanism, and hence the importance of strained CuBr${}_{2}$ as a candidate for room-temperature multiferroic applications.