Energy Gap Substructures in Conductance Measurements of MgB2-based Josephson Junctions: Beyond the 2-Gap Model

Steve Carabello, Joseph G. Lambert, Jerome Mlack +7

Several theoretical analyses of the two superconducting energy gaps of magnesium diboride, ${\Delta }_{\pi }$ and ${\Delta }_{\sigma }$, predict substructures within each energy gap, rather than two pure numbe…