Superconductivity and quantum oscillations in crystalline bi nanowire

Mingliang Tian, Jian Wang, Qi Zhang, Nitesh Kumar, Thomas E. Mallouk, Moses H.W. Chan

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

While bulk bismuth (Bi) is a semimetal, we have found clear evidence of superconductivity in 72 nm diameter crystalline Bi nanowire below 1.3 K. In a parallel magnetic field (H), the residual resistance of the nanowire below Tc displays periodic oscillations with H, and the period corresponds to a superconducting flux quantum. This result indicates that the superconductivity originates from the cylindrical shell between Bi inner core and the surface oxide layer. Under a perpendicular H, the resistance in the superconducting state shows Shubnikov-de Haas (SdH)-like oscillations, a signature of a normal metal. These results suggest a novel coexistence of superconducting and metallic states in the temperatures well below T c.

Original languageEnglish (US)
Pages (from-to)3196-3202
Number of pages7
JournalNano letters
Volume9
Issue number9
DOIs
StatePublished - Sep 9 2009

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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