Physics – Condensed Matter – Superconductivity
Scientific paper
2006-06-23
Physics
Condensed Matter
Superconductivity
The text will be submitted in Latex format, and the corresponding pdf file should take 6 pages. There are 5 figures (eps files
Scientific paper
A series of MgB$_2$ thin films systematically disordered by neutron irradiation have been studied by Scanning Tunneling Spectroscopy. The c-axis orientation of the films allowed a reliable determination of local density of state of the $\pi$ band. With increasing disorder, the conductance peak moves towards higher voltages and becomes lower and broader, indicating a monotonic increase of the $\pi$ gap and of the broadening parameter. These results are discussed in the frame of two-band superconductivity.
Aebersold H. U.
Capua R. Di
Ferdeghini Carlo
Ferrando V.
Orgiani P.
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