Spatial variations of the superconductor gap structure in MgB2/Al composite

A. Sharoni, O. Millo*, G. Leitus, S. Reich

*Corresponding author for this work

Research output: Contribution to journalLetterpeer-review

22 Scopus citations


Composites consisting of MgB2 and A1, 11% by volume, undergo a transition-superconductivity onset at TC = 38 K, close to the value reported for pure MgB2. The transition appears to have broadened, as determined by both magnetic and transport measurements, possibly due to the proximity effect and disorder. Spatially resolved tunnelling spectroscopy at 4.2 K shows a distribution of gap structures, from Bardeen-Cooper-Schrieffer-like spectra with 2Δ/kBTC = 3.2 to spectra that are typical for proximity superconductors.

Original languageAmerican English
Pages (from-to)L503-L508
JournalJournal of Physics Condensed Matter
Issue number22
StatePublished - 4 Jun 2001


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