Session W28 - High T$_c$ Superconductors XXII: Mesoscopic Superconductivity
and Josephson Coupling.
ORAL session, Thursday morning, March 15
Room 616, Washington State Convention Center
The BTK model (G.E. Blonder, M. Tinkham, T.M. Klapwijk, Phys. Rev. B25 (1982) 4515.) for normal metal/superconductor point contacts is modified to include electron spin polarization. This leads to a reduction in the availability of electrons from the minority spin band for Cooper pair formation and results in a decrease in the probability of Andreev reflection. This model exhibits all the major effects of a more rigorous model (A.A. Golubov, Physica C 326-327 (1999) 46.) but with the added feature that the spin polarization parameter can be uniquely extracted from charge transport data. Comparison with measurements will be presented.
Part W of program listing