Spin-resolved conductance quantization in InAs

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 2e(2) /h spin-resolved steps in units of e(2) /h up to the highest occupied mode. A conductance anomaly at 0.7 x 2e(2) /h is found as well.