Volume 86, Number 4, May 2009
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||05 June 2009|
Energy relaxation in a superconductor with magnetic impurities
Department of Physics, Lancaster University - Lancaster, UK, EU
2 Faculty of Science and Technology and MESA+ Institute for Nanotechnoloy, University of Twente Enschede, The Netherlands, EU
3 Advanced Studies and Technology Preparation Division Directorate of Science and Robotic Exploration of the European Space Agency - Noordwijk, The Netherlands, EU
Corresponding author: A.A.Golubov@utwente.nl
Accepted: 1 May 2009
In a superconductor with magnetic impurities, Kondo scattering results in the formation of localized states inside the superconducting gap. We show that inelastic electronic transitions involving quasiparticle scattering into and out of the localized states may result in significant changes in the non-equilibrium properties of the superconductor. Using the model of Muller-Hartmann and Zittartz for the extreme dilute limit, and including both deformation potential and spin-lattice coupling, we have calculated the rates of such inelastic transitions between continuum and discrete states, and shown that they may greatly modify quasiparticle interactions. The individual processes are: quasiparticle trapping into discrete states, enhanced recombination with localized quasiparticles, and pair breaking and de-trapping of localized quasiparticles by sub-gap phonons. We find that all these processes give rise to clearly distinguishable temperature dependences of the kinetic parameters.
PACS: 74.20.Fg – BCS theory and its development / 74.50.+r – Tunneling phenomena; point contacts, weak links, Josephson effects / 85.25.Oj – Superconducting optical, X-ray, and γ-ray detectors (SIS, NIS, transition edge)
© EPLA, 2009
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.