Superconducting fluctuations in a mesoscopic ring structure: Little–Parks oscillation in fluctuation regime

Superconducting fluctuation in a mesoscopic superconducting ring is studied and its effect on the Little–Parks oscillation is discussed. We introduce Ginzburg–Landau type effective action to describe the fluctuation of the order parameter and treat the nonlinear term by Hartree–Fock approximation. I...

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Bibliographic Details
Published inPhysica. C, Superconductivity Vol. 352; no. 1; pp. 191 - 194
Main Authors Hayashi, M., Ebisawa, H.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.04.2001
Subjects
Density of states
Ginzburg–Landau theory
Little–Parks oscillation
Superconducting fluctuation
74.40
74.62
Density of states
74.50
74.80.F
Little–Parks oscillation
Superconducting fluctuation
Ginzburg–Landau theory
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Summary:Superconducting fluctuation in a mesoscopic superconducting ring is studied and its effect on the Little–Parks oscillation is discussed. We introduce Ginzburg–Landau type effective action to describe the fluctuation of the order parameter and treat the nonlinear term by Hartree–Fock approximation. It is shown that the strength of the superconducting fluctuation varies as a function of the magnetic flux enclosed in the ring. This phenomenon is expected to be responsible for the experimentally observed reduction of the amplitude of Little–Parks oscillation.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0921-4534
1873-2143
DOI:10.1016/S0921-4534(00)01722-6