Application of metamaterial engineering to ultrathin TiN films: insulator to superconductor

ORAL

Abstract

It is well known that decreasing the film thickness of superconducting thin films commonly leads to a decrease of the superconducting critical temperature, Tc. Ultrathin TiN films are insulating for the film thickness of 4.5 nm and below. However, using ultrathin TiN layers with thickness below 4.5 nm in hyperbolic metamaterial TiN/dielectric multilayers restores superconductivity. The electronic transport and anisotropy of optical properties of TiN/dielectric multilayers were studied. Enhancement of the Tc and the critical field in these metamaterials was found. The role of dielectric material and variation of thicknesses of superconductor and dielectric will be discussed.

*This work was supported in part by ONR Awards N0001418-1-2681, N0001418WX00078, and N00014-18-1-2653, and by ONR under the Naval Research Laboratory base program.

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Presenters

  • Vera Smolyaninova

    • Towson University

Authors

  • Vera Smolyaninova

    • Towson University

  • Javier Arteaga

    • Towson University

  • Adrian Campbell

    • Towson University

  • Virginia Wheeler

    • Naval Research Laboratory, Washington, DC

  • Joseph C Prestigiacomo

    • Naval Research Laboratory, Washington, DC

  • Michael S Osofsky

    • Naval Research Laboratory, Washington, DC

  • Igor Smolyaninov

    • Saltenna LLC