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Quantum interference in a mesoscopic superconducting loop.

Author(s) : MOSHCHALKOV V. V., GIELEN L., DHALLE M., HAESENDONCK C. van, BRUYNSERAEDE Y.

Type of article: Article

Summary

A new type of SQUID based on a homogeneous mesoscopic superconducting loop was proposed by Fink, in which interference between the supercurrents passing through the two halves of the ring results in a critical current that varies with the applied magnetic field in an oscillatory manner. The authors describe the experimental observation of these oscillations in a mesoscopic superconducting aluminum loop without artificial weak links. In this new type of quantum interferometer, "weak-link" regions with a strongly reduced superconducting order parameter appear periodically at half-integer magnetic flux quanta owing to the interplay between the shielding and transport currents in the loop.

Details

  • Original title: Quantum interference in a mesoscopic superconducting loop.
  • Record ID : 1994-2734
  • Languages: English
  • Source: Nature - vol. 361 - n. 6413
  • Publication date: 1993/02/18
  • Document available for consultation in the library of the IIR headquarters only.

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