Probing PbTe-Pb nanowire devices with radio-frequency reflectometry

We report the implementation of radio-frequency (rf) reflectometry on selective-area-grown PbTe-Pb nanowire devices on a CdTe substrate. These nanowires were predicted to host Majorana zero modes. We demonstrate the compatibility of the rf technique, both resistive and capacitive sensing, with these nanowires. The effect of dielectric loss from the CdTe substrate is also discussed. The feasibility of rf reflectometry is also verified at finite magnetic fields where zero-energy modes occur. Our results enable the fast control of PbTe quantum devices, paving the way for its application in topological quantum computation.