Abstract
We report on the quantized conductance through side- and top-gated InAs quantum point contacts and discuss its dependence on the temperature and on a magnetic field applied perpendicular to the sample plane. Even in the absence of a magnetic field we observe besides the integer steps in units of 2e2/h spin-resolved steps in units of e2/h up to the highest occupied mode. A conductance anomaly at 0.7 × 2e2/h is found as well.
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