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MACROSCOPIC THEORY OF SUPERCONDUCTORS WITH SMALL COHERENCE LENGTH.

Author(s) : BULAEVSKIJ L. N., GINZBURG V. L., SOBYANIN A. A.

Type of article: Article

Summary

IN HIGH TEMPERATURE SUPERCONDUCTORS THE COHERENCE LENGTH IS NOT MUCH LARGER THAN THE INTERATOMIC DISTANCE. FOR THIS REASON THE FLUCTUATIONS ARE MORE IMPORTANT HERE THAN IN USUAL SUPERCONDUCTORS. ADDITIONALLY, THE HIGH TEMPERATURE SUPERCONDUCTORS ARE STRONGLY ANISOTROPIC. THE PROPERTIES OF THE HIGHLY ANISOTROPIC COMPOUNDS WITH THE RATIO COHERENCE LENGTH/INTERATOMIC DISTANCE OF THE ORDER OF ONE ARE DISCUSSED IN THE FRAMEWORK OF (A) THE USUAL GINZBURG-LANDAU (GL) THEORYWITHOUT FLUCTUATIONS, (B) THE USUAL GL THEORY TAKING INTO ACCOUNT THE GAUSSIAN FLUCTUATIONS, (C) THE MODIFIED GL THEORY WHICH TAKES INTO ACCOUNT THE CRITICAL FLUCTUATIONS BY USE OF THE RENORMALIZED TEMPERATURE DEPENDENCES OF THE COEFFICIENTS. ALSO LAYERED COMPOUNDS WITH JOSEPHSON COUPLING BETWEEN LAYERS ARE ANALYZED.

Details

  • Original title: MACROSCOPIC THEORY OF SUPERCONDUCTORS WITH SMALL COHERENCE LENGTH.
  • Record ID : 1989-1690
  • Languages: English
  • Source: Physica, C - vol. 152 - n. 5
  • Publication date: 1988/07
  • Document available for consultation in the library of the IIR headquarters only.

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