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Phys. Rev. B 38, 2922–2925 (1988)

1/f-noise-power measurements of copper oxide superconductors in the normal and superconducting states

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Joseph A. Testa, Yi Song, X. D. Chen, John Golben, Sung-Ik Lee*, Bruce R. Patton, and James R. Gaines†
Department of Physics, Ohio State University, Columbus, Ohio 43210

Received 4 March 1988; published in the issue dated 1 August 1988

The first measurements of the 1/f-noise spectrum in copper oxide superconductors are presented. The key features of our results are (1) no noise is found in the superconducting state, (2) in the normal state the noise is large, comparable in magnitude to that in metal-insulator composites, and (3) the temperature dependencies of the noise and the resistivity are opposite, unlike either metals or semiconductors. Implications for possible conduction models are considered.

© 1988 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.38.2922
DOI:
10.1103/PhysRevB.38.2922
PACS:

*Present address: Department of Physics, Pohang Institute of Science and Technology, Pohang, South Korea.

†Present address: Department of Physics, University of Hawaii at Manoa, Honolulu, HI 96822.

 
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