Infrared conductivity of superconducting NbTiN in a magnetic field

ORAL

Abstract

The optical conductivity of thin-film Nb$_{0.5}$Ti$_{0.5}$N in applied magnetic fields has been estimated from the results of far-infrared transmission and reflection measurements. The measurements were performed at the National Synchrotron Light Source, Brookhaven National Laboratory at fields up to 10 T. The combined measurements have been analyzed to give the real and imaginary parts of the conductivity. In turn, these quantities allow the magnetic-field dependence of the superconducting energy gap and the superfluid density to be estimated. The effect of pairbreaking by the field on the gap will be discussed.

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Authors

  • David Tanner

    University of Florida Physics Department, Physics Department, University of Florida, University of Florida, Department of Physics, University of Florida, Department of Physics, Univ. of Florida, Department of physics, University of Florida

  • Xiaoxiang Xi

    Department of Physics, University of Florida, Department of Physics, Univ. of Florida, University of Florida

  • J. Hwang

    Department of Physics, Pusan National University, Department of Physics, Pusan National Univ., Pusan National University

  • G.L. Carr

    Brookhaven National Laboratory, NSLS, Brookhaven National Laboratory, NSLS - Brookhaven National Lab