2012/01/30 by Jian Wang, Yi Sun, Mingliang Tian +3 · 29 citations
Chemistry · Physics and Astronomy · #Chemistry #Condensed matter physics #Crystallography #Electrical engineering #Electrical resistivity and conductivity #Electrode #Magnetic field #Materials science #Metal #Metallurgy #Nanotechnology #Nanowire #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Single crystal #Superconductivity #Surface and Thin Film Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.86.035439
published in Physical Review B 86(3) (American Physical Society)
arxiv created 2012/01/30 · openalex publication_date 2012/07/24 · arxiv updated 2012/07/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The transport properties of superconducting single crystal Pb nanowires that are 55 and 70 nm in diameter were studied by the standard four-electrode method. With normal metal electrodes, resistance-temperature and resistance-magnetic field scans show a series of resistance steps with increasing temperature and magnetic field as the wires are brought toward the normal state. The resistance-current (R-I) scans at different temperatures and magnetic fields show that the increase in R with I is punctuated with sharp steps at specific current values. A large residual resistance is observed down to 2 K. The origin of these phenomena is related to the inhomogeneity and proximity effect from the normal electrodes.