Abstract
is one of a handful of known topological insulators. Here we show that copper intercalation in the van der Waals gaps between the layers, yielding an electron concentration of , results in superconductivity at 3.8 K in for . This demonstrates that Cooper pairing is possible in at accessible temperatures, with implications for studying the physics of topological insulators and potential devices.
- Received 6 October 2009
DOI:https://doi.org/10.1103/PhysRevLett.104.057001
©2010 American Physical Society
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How to turn a topological insulator into a superconductor
Published 1 February 2010
By doping the topological insulator bismuth selenide with copper to form copper layers, a topological superconductor is created.
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