Differential Conductance Measurements of MgB2-Based Josephson Junctions Below 1 Kelvin

Differential Conductance Measurements of MgB2-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 MgB2 thin film Josephson junctions have been conducted above 2 Kelvin. We report results of sub-1 Kelvin experiments of MgB2/insulator/Pb junctions wh...

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Veröffentlicht in:arXiv.org 2010-10
Hauptverfasser: Carabello, Steve, Lambert, Joseph, Mlack, Jerome, Ramos, Roberto
Format: Artikel
Sprache:eng
Schlagworte:
Conductivity
Critical temperature
Differential thermal analysis
Electron tunneling
Josephson junctions
Magnesium compounds
Physics - Superconductivity
Resistance
Thin films
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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 MgB2 thin film Josephson junctions have been conducted above 2 Kelvin. We report results of sub-1 Kelvin experiments of MgB2/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:2331-8422
DOI:10.48550/arxiv.1010.4289