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The effect of quasiparticle self-generation on the performance of small gap, multi-tunnelling STJs.

Kozorezov, Alexander G. and Brammerts, G. and Wigmore, J. K. and den Hartog, R. and Verhoeve, P. and Peacock, A. and Martin, D. and Venn, R. (2004) The effect of quasiparticle self-generation on the performance of small gap, multi-tunnelling STJs. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 520 (1-3). pp. 227-230. ISSN 0168-9002

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Abstract

Due to the slowness of the electron–phonon interaction in small gap STJs currently being developed as the latest generation of photon detectors, during the device operation a broad statistical distribution of interacting quasiparticles and phonons is established. This gives rise to new physical phenomena and also renders the traditional Rothwarf–Taylor model completely inadequate for the analysis of quasiparticle and phonon dynamics for all traditional superconductors except unproximised Nb. We have developed a new kinetic approach replacing the Rothwarf–Taylor scheme. We demonstrate the results of experimental and theoretical studies of the new physical phenomenon of quasiparticle self-generation in a heavily proximised multiple tunneling Ta/Al STJ and discuss the implications of the observed quasiparticle self-generation for photon detection.

Item Type: Article
Journal or Publication Title: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Uncontrolled Keywords: Superconducting tunnel junctions ; Non-equilibtium quasiparticles and phonons
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 23882
Deposited By: ep_ss_importer
Deposited On: 23 Feb 2009 11:33
Refereed?: Yes
Published?: Published
Last Modified: 30 May 2014 11:52
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/23882

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