Our group’s work on discovering Goniopolar behavior in NaSn2As2 is published in Nature Materials. Briefly, most electronic materials are thought of as either metallic, or semiconducting that is doped to give a particular p-type or n-type conduction behavior. However, layered materials have different orbitals holding the structure together in-plane vs. cross-plane. Here we discover that these layered materials can simultaneously exhibit n-type behavior in-plane vs. p-type behavior cross-plane. This “crystallographic angle-dependence” of conduction polarity we denote as “Goniopolarity”

See press;

https://news.osu.edu/researchers-discover-new-material-to-help-power-electronics/