1997/11/24 by A. F. Volkov, V. V. Pavlovskii, В. Павловский
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Surface and Thin Film Phenomena #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1063/1.55281
17 pages, Report presented at Euroschool on Physics of Mesoscopic systems (Sienna, Italy,'97)
arxiv created 1997/11/24 · openalex publication_date 1998/01/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/29
A short introduction to the theory of matrix quasiclassical Green’s functions is given and possible applications of this theory to transport properties of mesoscopic superconducting-normal metal (S/N) structures are considered. We discuss a simplified version of these equations in the diffusive regime and in the case of a weak proximity effect. These equations are used for the calculation of the conductance of different S/N structures and for analysis of kinetic phenomena in these structures. We discuss the subgap conductance measured in SIN tunnel junctions and the mechanism of a nonmonotonic dependence of the conductance of a N wire on temperature T and voltage V, observed in an S/N structure. Long-range, phase-coherent effects are studied in a 4-terminal S/N/S structure under conditions when the Josephson critical current is negligible (the distance between superconductors is much larger then the coherence length in the normal wire). It is shown that the Josephson effects may be observed in this system if a current I, in addition to a current I1 in the S/N/S circuit, flows through the N electrode.