2001/06/15 by N. Moussy, N Moussy, H. Courtois +3 · 1 citation
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Surface and Thin Film Phenomena #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1209/epl/i2001-00361-2
published as Europhys. Lett. 55, 861 (2001) · 7 pages, 3 figures
arxiv created 2001/06/15 · openalex publication_date 2001/09/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We performed the local spectroscopy of a Normal-metal–Superconductor (N-S) junction with the help of a very low-temperature (60 mK) Scanning Tunneling Microscope (STM). The spatial dependence of the local density of states was probed locally in the vicinity of the N-S interface. We observed spectra with a fully developed gap in the regions where a thin normal-metal layer caps the superconductor dot. Close to the S metal edge, a clear pseudo-gap shows up, which is characteristic of the superconducting proximity effect in the case of a long normal metal. The experimental results are compared to the predictions of the quasiclassical theory.