Hydrogen-tuned topological insulators may lead to new platforms in sustainable quantum electronics
https://phys.org/news/2022-05-hydrogen-tuned-topological-insulators-platforms-sustainable.html
"hydrogen-tuning technique chalcogen-based topological materials and nanostructures... insertion and extraction of ionic hydrogen from dilute aqueous hydrochloric acid (HCl) solution, which leaves the layered topological crystal structure as well as electronic bands intact... removing native surface oxide while passivating surfaces... electrons are donated by reversible binding of H+ ions to chalcogens... Te or Se, and bulk carrier densities reduced"
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