A subKelvin scanning probe microscope for the electronic spectroscopy of   an individual nano-device
  We present a combined scanning force and tunneling microscope working in a dilution refrigerator that is optimized for the study of individual electronic nano-devices. This apparatus is equipped with commercial piezo-electric positioners enabling the displacement of a sample below the probe over several hundred microns at very low temperature, without excessive heating. Atomic force microscopy based on a tuning fork resonator probe is used for cryogenic precise alignment of the tip with an individual device. We demonstrate the local tunneling spectroscopy of a hybrid Josephson junction as a function of its current bias. 
Thomas Quaglio (NEEL), Franck Dahlem (NEEL), Sylvain Martin (NEEL),   Anne Gerardin (NEEL), Clemens Winkelmann (NEEL), Herv\...
cond-mat.mes-hall cond-mat.supr-con physics.ins-det