Charge Imbalance Relaxation Due to Pair Breaking Perturbation by Magnetic Field

We observed the relaxation of the charge imbalance of nonequilibrium superconductivity due to pair breaking perturbation by magnetic field. We performed an injection experiment using a multiterminal tunnel junction device fabricated by electron beam lithography. We observed that excess current due t...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2010-01, Vol.79 (1), p.013704-013704-3
Main Author: Tsuboi, Kazuki
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Physics
Properties of type I and type II superconductors
Superconductivity
Transport properties (electric and thermal conductivity, thermoelectric effects, etc.)
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Summary:We observed the relaxation of the charge imbalance of nonequilibrium superconductivity due to pair breaking perturbation by magnetic field. We performed an injection experiment using a multiterminal tunnel junction device fabricated by electron beam lithography. We observed that excess current due to charge imbalance was considerably suppressed by weak magnetic fields perpendicular to the substrate. The suppression tended to vanish as magnetic field was tilted. We analyzed the result using the Boltzmann transport theory of charge imbalance involving relaxation by pair breaking perturbation.
ISSN:0031-9015
1347-4073
DOI:10.1143/JPSJ.79.013704