Ultra-high vacuum fabrication of metal/insulator/superconductor junctions for spin polarization measurements
ORAL
Abstract
Using a unique ultra-high vacuum (UHV) deposition chamber equipped with electron gun deposition sources, sputter deposition and plasma oxidation, we are depositing shadow mask defined tunnel junctions. These unique capabilities allow us to assess the importance of creating high quality tunneling materials in the ultra-thin regime where abrupt chemical interfaces and near-ideal stoichiometries are important. In this talk, I will present experimental details about this unique system and discuss devices being fabricated, including spectroscopy measurement techniques using the superconductor quasi-particle DOS as an analyzer.
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