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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/19183
Title: The critical Josephson currents in MgB<inf>2</inf>/normal metal/MgB<inf>2</inf>tunnel junctions: Bogoliubov-de Gennes approach
Authors: Bumned Soodchomshom
I. Ming Tang
Rassmidara Hoonsawat
Mahidol University
The Institute of Science and Technology for Research and Development, Mahidol University
Keywords: Energy;Engineering;Materials Science;Physics and Astronomy
Issue Date: 1-Jan-2008
Citation: Physica C: Superconductivity and its Applications. Vol.468, No.1 (2008), 47-53
Abstract: The Josephson currents passing through the S1/N/S2double tunnel junctions where S1can be either an MgB2or a conventional superconductor (CS), S2is MgB2and N is a normal metal are investigated. The Bogoliubov-de Gennes approach is used to calculate the Andreev reflection coefficients at the S1/N interface barrier. The Fermi wave vectors mismatch among S1, N and S2, and the difference in the TC's of the two superconductors are taken into account. For the MgB2/N/MgB2junction, the Josephson currents in both the c-axis and the ab-plane orientation alignments are studied. For the CS/N/MgB2junctions, only the Josephson current in the c-axis orientation is studied. Our results for critical Josephson currents flowing along c-axis orientation of both types of S1/N/S2junctions are compared to four sets of the experimental data. We find that the fitting of the experimental data for the temperature dependence of the Josephson junctions to our results are in good agreement in all four cases. © 2007 Elsevier B.V. All rights reserved.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=37649012301&origin=inward
http://repository.li.mahidol.ac.th/dspace/handle/123456789/19183
ISSN: 09214534
Appears in Collections:Scopus 2006-2010

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