Superconducting fluctuation magnetoconductance in a tungsten carbide film

Ralph Rosenbaum*, Shih-ying Hsu, Jing Yin Chen, Yong Han Lin, Juhn-Jong Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Magnetoconductance (MC) measurements have been performed on a 2140 Å thick tungsten carbide film at temperatures very close to the superconducting transition temperature T c of the film. The data are dominated by superconducting fluctuations. A novel three-dimensional phenomenological model is proposed to explain the MC data, yielding good fits. The Larkin beta factor, Β Larkin , appeared as a fitting parameter. An expression proposed by Larkin for β Larkin failed badly for temperatures extremely close to T c . But at intermediate and high temperatures compared to T c , Larkin's expression gave very good agreement in fits to the MC data. At temperatures very close to T c , a crossover from three dimensions to two dimensions was observed in the behaviour of the MC of the film.

Original languageEnglish
Pages (from-to)10041-10056
Number of pages16
JournalJournal of Physics Condensed Matter
Issue number44
StatePublished - 5 Nov 2001


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