IDEALS II Co-PI, Prof. Lia Krusin-Elbaum, Leads Breakthrough Research

IDEALS II co-PI Prof. Lia Krusin-Elbaum is behind breakthrough research on hydrogen-tuned topological insulators which may lead to new platforms in sustainable quantum electronics that could open a breadth of new quantum device platforms for harnessing emergent topological states for nano-spintronics and fault-tolerant quantum computing.

The Krusin group has invented a new facile and powerful technique that uses ionic hydrogen to reduce charge carrier density in the bulk of three-dimensional (3D) topological insulators and magnets. Their research, "Topological surface currents accessed through reversible hydrogenation of the three-dimensional bulk," appears in the journal "Nature Communications."

"The main advance of this work is that the new hydrogenation process is fully reversible, as hydrogen-chalcogen moiety can be disassociated by a low-temperature annealing protocol under which hydrogen is easily removed," said Prof. Krusin-Elbaum. "It is also multiply-cyclable and reproducible, thereby resolving one of the key limitations of magnetic and nonmagnetic topological insulators and can be applied not only post-growth to materials but also to fully fabricated nanodevices."

Prof. Krusin-Elbaum and her team said that the technique they have demonstrated is very general and ultimately may advance the potential of intrinsic topological magnets to transform future quantum electronics.

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