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Density of states measurements of Al lightly doped with Mn

Published

Author(s)

Galen O'Neil, Dan Schmidt, Nathan A. Tomlin, Joel Ullom, Kent D. Irwin, Anthony S. Williams, Gerry Arnold, Steve T. Ruggiero

Abstract

Al lightly doped with Mn is a tunable superconductor, potentially useful in normalmetal/insulator/superconductor refrigerators. The superconducting transition temperature varies with Mn concentration and the density of states is like a BCS superconductor with a reduced gap. We present results from superconducting tunnel junction measurements that demonstrate the BCS-like density of states. We discuss the limitations of our measurements based upon purity of the materials used to fabricate tunnel junctions, as well as our expectations for new measurements with cleaner materials.
Citation
Journal of Low Temperature Physics
Volume
151
Issue
1-2

Keywords

abrikosov, AlMn, DOS, kaiser, tunnel junction

Citation

O'Neil, G. , Schmidt, D. , Tomlin, N. , Ullom, J. , Irwin, K. , Williams, A. , Arnold, G. and Ruggiero, S. (2008), Density of states measurements of Al lightly doped with Mn, Journal of Low Temperature Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32760 (Accessed May 26, 2024)

Issues

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Created January 28, 2008, Updated October 12, 2021