Conductance G of a 2DEG-Superconductor (S) device in a high magnetic field
is studied; G(nu) is calculated. When the cyclotron diameter in 2DEG is lar
ger than the width of the 2DEG-S surface, G(nu) becomes a nonmonotonic func
tion, owing to the Aharonov-Bohm-type interference of quasiparticles at the
surface. At certain parameters of the junction, the conductance oscillates
with nu. (C) 2001 MAIK "Nauka/Interperiodica".