Dependence of the quasiparticle recombination rate on the superconducting gap and T$_{C}$

ORAL

Abstract

The relaxation of excess quasiparticles in a BCS superconductor is known to depend on quantities such as the quasiparticle {\&} phonon density of states, and their coupling (Kaplan et al, \textit{Phys. Rev.} B \textbf{14} 4854, 1976). Disorder or an applied field can disrupt superconductivity, as evidenced by a reduced T$_{C}$. We consider some simple modifications to the quasiparticle density of states consistent with a suppressed energy gap and T$_{C}$, leading to changes in the intrinsic and effective (measured) rates for excess quasiparticles to recombine into pairs.~ We review some results for disordered MoGe and discuss the magnetic-field dependence of the recombination process.

*Supported by the US DOE through contracts DE-FG02-02ER45984 at UF and DE-AC02-98CH10886 at the NSLS.

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Authors

  • G.L. Carr

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

  • 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

  • H. Tashiro

    • Department of Physics, Univ. of Florida

  • D.H. Reitze

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

  • 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