DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Journal Article · · Journal of Applied Physics
DOI: https://doi.org/10.1063/5.0057663 · OSTI ID:1819087
ORCiD logo [1];  [1];  [1]; ORCiD logo [2];  [3];  [4];  [5];  [6]
  1. Towson University, MD (United States)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  3. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); College of William and Mary, Williamsburg, VA (United States)
  4. College of William and Mary, Williamsburg, VA (United States)
  5. Naval Research Lab. (NRL), Washington, DC (United States)
  6. Univ. of Maryland, College Park, MD (United States); Saltenna LLC, McLean, VA (United States)

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. Here, 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 measured critical fields are high and have an anomalous temperature dependence on the direction perpendicular to the magnetic field. These results demonstrate that the metamaterial engineering approach can be used to enhance Hc2.

Research Organization:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); Defense Advanced Research Projects Agency (DARPA); US Department of the Navy, Office of Naval Research (ONR)
Grant/Contract Number:
AC05-06OR23177
OSTI ID:
1819087
Report Number(s):
JLAB-ACC--21-3380; DOE/OR/23177-5202; W911NF-17-1-0348; N0001418-1-2681; N0001418WX00078; and N00014-18-1-2653; Naval Research Laboratory base program
Journal Information:
Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 130; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (26)

On anomalous temperature dependence of HC2⊥ in natural and artificial layer superconductors journal May 1999
Superconducting properties of tin-based ENZ and hyperbolic metamaterials journal October 2019
Multilayer microwave integrated quantum circuits for scalable quantum computing journal February 2016
Hybrid rf SQUID qubit based on high kinetic inductance journal July 2018
Enhanced superconductivity in aluminum-based hyperbolic metamaterials journal September 2016
Superconducting Properties of Niobium‐Titanium‐Nitride thin Films journal November 1969
Enhancement of rf breakdown field of superconductors by multilayer coating journal January 2006
Minimal resonator loss for circuit quantum electrodynamics journal July 2010
Suppression of superconductivity in epitaxial NbN ultrathin films journal February 2011
Radio-frequency electromagnetic field and vortex penetration in multilayered superconductors journal January 2014
Permittivity evaluation of multilayered hyperbolic metamaterials: Ellipsometry vs. reflectometry journal March 2015
Superconducting properties and chemical composition of NbTiN thin films with different thickness journal September 2015
NbTiN thin films for superconducting photon detectors on photonic and two-dimensional materials journal April 2020
Superheating fields of semi-infinite superconductors and layered superconductors in the diffusive limit: structural optimization based on the microscopic theory journal March 2021
Temperature and Purity Dependence of the Superconducting Critical Field, H c 2 . III. Electron Spin and Spin-Orbit Effects journal July 1966
Destruction of Superconductivity in Disordered Near-Monolayer Films journal February 1970
Pair-breaking model for disorder in two-dimensional superconductors journal October 1984
Renormalization of the upper critical field by superconducting fluctuations journal April 2003
Universal scaling of the critical temperature for thin films near the superconducting-to-insulating transition journal December 2014
Metamaterial superconductors journal March 2015
Resistive upper critical field of Tl 2 Ba 2 CuO 6 at low temperatures and high magnetic fields journal August 1993
Anomalous temperature dependence of the upper critical magnetic field in Bi-Sr-Cu-O journal October 1993
Measurement of the coherence length of sputtered Nb/sub 0.62/Ti/sub 0.38/N thin films journal June 2002
Investigation of NbTiN Thin Films and AlN Tunnel Barriers With Ellipsometry for Superconducting Device Applications journal June 2007
Development of Nb/Al-AlN/NbTiN SIS Junctions With ICP Nitridation journal June 2009
Nonmagnetic nanocomposites for optical and infrared negative-refractive-index media journal January 2006