Effect of metamaterial engineering on the superconductive properties of ultrathin layers of NbTiN

ORAL

Abstract



The electronic transport and optical properties of high quality multilayers of NbTiN/AlN with ultrathin NbTiN layers were characterized.   The anisotropy of the dielectric function of the multilayers confirmed their hyperbolic metamaterial properties. The superconductive transition temperature, Tc, of these engineered superconductors was enhanced up to 32% compared to the Tc of a single ultrathin NbTiN layer while the resistivity per NbTiN layer remained unchanged.  We have demonstrated that this Tc increase can be attributed to enhanced electron-electron interaction in superconducting hyperbolic metamaterials.  The behaviour of the critical fields will be discussed.

*This work was supported in part by DARPA Award No: W911NF-17-1-0348 “Metamaterial Superconductors” and by ONR Awards N0001418-1-2681, N0001418WX00078, and N00014-18-1-2653, and by ONR under the Naval Research Laboratory base program. A.-M. Valente-Feliciano and D.R. Beverstock are also supported by the U.S. Department of Energy, Office of Science, and Office of Nuclear Physics under contract DE-AC05-06OR23177.

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Publication: Vera N. Smolyaninova, William Korzi, Grace Yong, Anne-Marie Valente-Feliciano, David R. Beverstock, Joseph C. Prestigiacomo, Michael S. Osofsky, and Igor I. Smolyaninov, J. Appl. Phys. 130, 073901 (2021)

Presenters

  • Vera N Smolyaninova

    • Towson University

Authors

  • Vera N Smolyaninova

    • Towson University

  • William Korzi

    • Towson University

  • Grace Yong

    • Loyola University Maryland
    • Towson University

  • Anne-Marie Valente-Feliciano

    • Jefferson Lab

  • Joseph C Prestigiacomo

    • Unated States Naval Research Laboratory

  • David R Beverstock

    • Jefferson Lab and College of William & Mary

  • Michael S Osofsky

    • United States Naval Research Laboratory

  • Igor I Smolyaninov

    • University of Maryland College Park and Saltenna LLC