Leighton, Mkhoyan, and Birol Groups Achieve New Room-Temperature Functionality in Perovskite Oxides

Recent collaborative work from the Leighton, Mkhoyan, and Birol groups, just published in the journal Nature Communications, has achieved the first room-temperature valence transition in a perovskite oxide. This collaborative team, led by graduate students Vipul Chaturvedi, Supriya Ghosh, and Dominique Gautreau, used strain engineering in epitaxial thin films to tune the properties of complex praseodymium- and cobalt-containing oxides. These materials were previously known to exhibit a unique phase transition driven by a highly unusual change in the valence of the ions, but at cryogenic temperatures. Through strain engineering, the team were able to promote this transition to 291 K, establishing the first example of room-temperature valence control in such materials, with numerous implications. 

The work was performed in collaboration with NIST, Argonne, Oak Ridge, and the U of M Characterization Facility, and funded primarily by the DOE through the U of M Center for Quantum Materials. 

Learn more here: https://www.nature.com/articles/s41467-022-35024-8

Chaturvedi et al., Nature Communications 13, 7774 (2022).