2004/05/17 by J. G. Rodrigo, Hermann Suderow, H. Suderow +2 · 2 citations
Engineering · Physics and Astronomy · #Condensed matter physics #Cryostat #Dilution refrigerator #Josephson effect #Materials science #Molecular Junctions and Nanostructures #Optoelectronics #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum tunnelling #Refrigerator car #Spectroscopy #Superconductivity #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1140/epjb/e2004-00273-y
PDF file, 8 pages, accepted for publication in The European Physical Journal B, for the topical issue on Colective phenomena in Mesoscopic systems
arxiv created 2004/05/17 · openalex publication_date 2004/08/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report on high quality local tunnel spectroscopy measurements in superconductors using in-situ fabricated superconducting tips as counterelectrode. The experiments were made at very low temperatures using a dilution refrigerator and a 3He cryostat. Spectra obtained with superconducting tip and sample of Al show that the spectroscopic resolution of our set-up is of 15 microeV . Following the observation of Josephson current in tunneling regime (with tips of Pb and of Al), we discuss the feasibility of Scanning Josephson Spectroscopy with atomic size resolution. Experiments showing new applications of these superconducting tips under applied external magnetic fields are also reported.