volume 89, issue 3, P639-644 2007
DOI: 10.1007/s00339-007-4192-5
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Abstract: ABSTRACT We investigated transport in Nb-InAs hybrid structures in perpendicular magnetic fields up to the quantum Hall regime. Due to the high contact quality of our samples, Andreev reflection dominates the transport properties in a range of experimental parameters. Our experiments were performed on periodic arrays of Nb filled stripes or antidots in an InAs-based 2DEG. According to geometry and field strength we observe the following effects: At low fields, up to a few flux quanta per unit cell, we find ph…

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