Andreev reflection in strong magnetic fields

We have studied the interplay of Andreev reflection and cyclotron motion of quasiparticles at a superconductor- normal-metal interface with a strong m agnetic field applied parallel to the interface. Bound states are formed du e to the confinement introduced by both the external magnetic field and the superconducting gap. These bound states are a coherent superposition of el ectron and hole edge excitations similar to those realized in finite quantu m-Hall samples. Vie find the energy spectrum for these Andreev edge states and calculate transport properties.