The phase-dependent linear conductance of a superconducting quantum point contact
Entidad
UAM. Departamento de Física Teórica de la Materia CondensadaEditor
Institute of Physics Publishing (IOP)Fecha de edición
1996-01-22Cita
10.1088/0953-8984/8/4/010
Journal of Physics Condensed Matter 8.4 (1996): 449-456
ISSN
0953-8984 (print); 1361-648X (online)DOI
10.1088/0953-8984/8/4/010Financiado por
Support by Spanish CICYT (Contract No. PB93-0260) is acknowledged. One of us (A.L.Y.) acknowledges support by the European Community under contract No.CI1*CT93- 0247Proyecto
Gobierno de España. PB93-0260Versión del editor
http://dx.doi.org/10.1088/0953-8984/8/4/010Materias
74.50.+r; 85.25.Cp; 73.20.Dx; FísicaNota
This is the peer reviewed version of the following article: Journal of Physics Condensed Matter 8.4 (1996): 449-456, which has been published in final form at http://dx.doi.org/10.1088/0953-8984/8/4/010Derechos
© 1996 IOP Publishing LtdResumen
The exact expression for the phase-dependent linear conductance of a weakly damped superconducting quantum point contact is obtained. The calculation is performed by summing the complete perturbative series in the coupling between the electrodes, thus taking into account all possible multiple Andreev reflections inside the gap. The failure of any finite order perturbative expansion in the limit of small voltage and small quasi-particle damping is analysed in detail. In the low transmission regime this nonperturbative calculation yields a result which is at variance with standard tunnel theory. Our result predicts the correct sign of the quasi-particle pair interference term and exhibits an unusual phase-dependence at low temperatures in qualitative agreement with the available experimental data
Lista de ficheros
Google Scholar:Levy-Yeyati Mizrahi, Alfredo
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Martín-Rodero, A.
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Cuevas Rodríguez, Juan Carlos
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