Low Temperature Physics: 29, 650 (2003); https://doi.org/10.1063/1.1596793 (2 pages)
Fizika Nizkikh Temperatur: Volume 29, Number 8 (August 2003), p. 868-870    ( to contents , go back )

Electrical conductivity of superconducting point contacts containing magnetic impurities

S.I. Beloborod`ko

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Science of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine
E-mail: biloborodko@ilt.kharkov.ua
pos Анотація:

Received March 26, 2003


The nonlinear electrical conductivity of a superconductor-contraction-normal metal contacts containing magnetic impurities is studied. The influence of transparency of a potential barrier which arises at the boundary of the contact metals on the dependence of conductivity and the magnitude of excess current is analyzed. It is shown that in the limit of low transparency the differential conductivity of such contact is proportional to the density of electronic states.

74.50.+r - Tunneling phenomena; point contacts, weak links, Josephson effects (for SQUIDs, see 85.25.Dq; for Josephson devices, see 85.25.Cp; for Josephson junction arrays, see 74.81.Fa)

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