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- Publisher
- American Physical Society (APS)
- Copyright
- Copyright © 2003 The American Physical Society
- ISSN
- 1095-3795
- DOI
- 10.1103/PhysRevB.68.052506
- Publisher site
- See Article on Publisher Site
Abstract
We have experimentally studied the energy levels of a mesoscopic superconducting quantum interference device (SQUID) using inelastic Cooper-pair tunneling. The tunneling in a small Josephson junction depends strongly on its electromagnetic environment. We use this fact to do energy-level spectroscopy of a SQUID loop by coupling it to a small junction. Our samples with strong quasiparticle dissipation are well described by a model of a particle localized in one of the dips in a cosine potential, while in the samples with weak dissipation we can see formation of energy bands.
Journal
Physical Review B – American Physical Society (APS)
Published: Aug 1, 2003