Superconductivity in single crystalline Pb nanowires contacted by normal metal electrodes

Jian Wang, Yi Sun, Mingliang Tian, Bangzhi Liu, Meenakshi Singh, Moses H.W. Chan

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number035439
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number3
DOIs
StatePublished - Jul 24 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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