Differential Conductance Measurements of MgB 2 -Based Josephson Junctions Below 1 Kelvin

Differential Conductance Measurements of MgB 2 -Based Josephson Junctions Below 1 Kelvin

Magnesium diboride has many intriguing characteristics, including its relatively high critical temperature and two-band nature. Most prior studies of MgB 2 thin film Josephson junctions have been conducted above 2 Kelvin. We report results of sub-1 Kelvin experiments of MgB 2 / insulator / Pb juncti...

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Veröffentlicht in:IEEE transactions on applied superconductivity 2011-06, Vol.21 (3), p.3083-3085
Hauptverfasser: Carabello, Steve, Lambert, Joseph, Mlack, Jerome, Ramos, Roberto
Format: Artikel
Sprache:eng
Schlagworte:
Borides
Conductance
Insulators
Josephson junctions
Lead (metal)
Magnesium
Magnesium compounds
Superconductivity
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Zusammenfassung:Magnesium diboride has many intriguing characteristics, including its relatively high critical temperature and two-band nature. Most prior studies of MgB 2 thin film Josephson junctions have been conducted above 2 Kelvin. We report results of sub-1 Kelvin experiments of MgB 2 / insulator / Pb junctions whose a - b plane is exposed for electron tunneling. By measuring differential conductance at low temperature, new details in the structure of the sigma- and pi-band gaps are observed in this data, consistent with theoretical predictions.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2010.2089669