Size dependent breakdown of superconductivity in ultranarrow nanowires

Nano Lett. 2005 Jun;5(6):1029-33. doi: 10.1021/nl050321e.

Abstract

Below a certain temperature T(c) (typically cryogenic), some materials lose their electric resistance R entering a superconducting state. Following the general trend toward a large scale integration of a greater number of electronic components, it is desirable to use superconducting elements in order to minimize heat dissipation. It is expected that the basic property of a superconductor, i.e., dissipationless electric current, will be preserved at reduced scales required by modern nanoelectronics. Unfortunately, there are indications that for a certain critical size limit of the order of approximately 10 nm, below which a "superconducting" nanowire is no longer a superconductor in a sense that it acquires a finite resistance even at temperatures close to absolute zero. In the present paper we report experimental evidence for a superconductivity breakdown in ultranarrow quasi-1D aluminum nanowires.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aluminum
  • Electric Conductivity
  • Electric Impedance
  • Electricity
  • Electronics
  • Hot Temperature
  • Nanotechnology / methods*
  • Physical Phenomena
  • Physics
  • Temperature

Substances

  • Aluminum