Strain-stabilized superconductivity

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Date
2021
Volume
12
Issue
Journal
Nature Communications
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Publisher
[London] : Nature Publishing Group UK
Abstract

Superconductivity is among the most fascinating and well-studied quantum states of matter. Despite over 100 years of research, a detailed understanding of how features of the normal-state electronic structure determine superconducting properties has remained elusive. For instance, the ability to deterministically enhance the superconducting transition temperature by design, rather than by serendipity, has been a long sought-after goal in condensed matter physics and materials science, but achieving this objective may require new tools, techniques and approaches. Here, we report the transmutation of a normal metal into a superconductor through the application of epitaxial strain. We demonstrate that synthesizing RuO2 thin films on (110)-oriented TiO2 substrates enhances the density of states near the Fermi level, which stabilizes superconductivity under strain, and suggests that a promising strategy to create new transition-metal superconductors is to apply judiciously chosen anisotropic strains that redistribute carriers within the low-energy manifold of d orbitals.

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Ruf, J. P., Paik, H., Schreiber, N. J., Nair, H. P., Miao, L., Kawasaki, J. K., et al. (2021). Strain-stabilized superconductivity ([London] : Nature Publishing Group UK). [London] : Nature Publishing Group UK. https://doi.org//10.1038/s41467-020-20252-7
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CC BY 4.0 Unported