Combined scanning force microscopy and scanning tunneling spectroscopy of an electronic nano-circuit at very low temperature

Julien Senzier , Pengshun S. Luo , Hervé Courtois (1)

1 NEEL - QuNES - Nano-Electronique Quantique et Spectroscopie

We demonstrate the combination of scanning force microscopy and scanning tunneling spectroscopy in a local probe microscope operating at very low temperature (60 mK). This local probe uses a quartz tuning fork ensuring high tunnel junction stability. We performed the spatially-resolved spectroscopic study of a superconducting nano-circuit patterned on an insulating substrate. Significant deviations from the BCS prediction are observed.

Domaines: Supraconductivité [cond-mat.supr-con]

Julien Senzier, Pengshun S. Luo, Hervé Courtois. Combined scanning force microscopy and scanning tunneling spectroscopy of an electronic nano-circuit at very low temperature. Applied Physics Letters, 2007, 90 (4), pp.043114. ⟨10.1063/1.2436651⟩. ⟨hal-00106410v2⟩