Long, Highly-Ordered High-Temperature Superconductor Nanowire Arrays

Ke Xu and James R. Heath*
Division of Chemistry and Chemical Engineering, California Institute of Technology, MC 127-72, Pasadena, California 91125
Nano Lett., 2008, 8 (11), pp 3845–3849
DOI: 10.1021/nl802264x
Publication Date (Web): October 28, 2008
Copyright © 2008 American Chemical Society
* Corresponding author. E-mail: heath@caltech.edu.

Abstract

Abstract Image

The preparation and electrical properties of high-temperature superconductor nanowire arrays are reported for the first time. YBa2Cu3O7−δ nanowires with widths as small as 10 nm (much smaller than the magnetic penetration depth) and lengths up to 200 μm are studied by four-point electrical measurements. All nanowires exhibit a superconducting transition above liquid nitrogen temperature and a transition temperature width that depends strongly upon the nanowire dimensions. Nanowire size effects are systematically studied, and the results are modeled satisfactorily using phase-slip theories that generate reasonable parameters. These nanowires can function as superconducting nanoelectronic components over much wider temperature ranges as compared to conventional superconductor nanowires.

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History

  • Published In Issue November 12, 2008
  • Article ASAPOctober 28, 2008
  • Received: July 26, 2008
    Revised: October 2, 2008

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