A. Hadicke et W. Krech, TUNNELING THROUGH ULTRASMALL NIS JUNCTIONS IN TERMS OF ANDREEV REFLECTION - A NONLINEAR RESPONSE APPROACH, Physica status solidi. b, Basic research, 191(1), 1995, pp. 129-139
The Andreev current through an ultrasmall NIS junction is calculated i
n a systematic way by means of a nonlinear response approach basing on
the elementary Hamiltonian of quasiparticle tunneling. The voltage de
pendence of current and differential conductance as well as the Andree
v conductance are derived for low- and high-impedance environments, re
spectively.