Tunneling spectroscopy in small grains of superconducting MgB(2)

We report on tunneling spectroscopy experiments in small grains of the new binary intermetallic superconductor MgB(2). Experiments have been performed at 2.5 K using a low temperature scanning tunneling microscope. Good fit to the BCS model is obtained, with a gap value of 2 meV. In the framework of...

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Bibliographic Details
Published inPhysical review letters Vol. 86; no. 24; p. 5582
Main Authors Rubio-Bollinger, G, Suderow, H, Vieira, S
Format Journal Article
LanguageEnglish
Published United States 11.06.2001
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Summary:We report on tunneling spectroscopy experiments in small grains of the new binary intermetallic superconductor MgB(2). Experiments have been performed at 2.5 K using a low temperature scanning tunneling microscope. Good fit to the BCS model is obtained, with a gap value of 2 meV. In the framework of this model, this value should correspond to a surface critical temperature of 13.2 K. No evidence of gap anisotropy has been found.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.86.5582