Report
Electronic structure of impurities and vortices in short coherence length superconductors: Annual rept. 1 Jul 97-30 Jun 98
Defense Technical Information Center, ADA356283
U.S. Department of Defense
07/01/1998
Abstract
This is a final report on theoretical calculation of scanning tunneling microscopy spectra near impurities in superconductors. Calculations have been performed for superconductors with isotropic and anisotropic gaps using a newly developed Green's function technique. This technique provides essentially arbitrary energy resolution and is applicable to strong or weak- coupling superconductors with long or short coherence lengths and arbitrary energy gaps. An analytic model has been developed for impurities in superconductors with either anisotropic or isotropic gaps. Calculation of planar tunneling spectra can reproduce the (quite different) results from several different groups with a d-wave gap and a small amount (1%) of impurities. These impurities are believed to be oxygen vacancies. A systematic investigation of the properties of impurity-associated resonance states in the gap has also been done.
Details
- Title: Subtitle
- Electronic structure of impurities and vortices in short coherence length superconductors: Annual rept. 1 Jul 97-30 Jun 98
- Creators
- Michael Flatte
- Resource Type
- Report
- Publication Details
- Defense Technical Information Center, ADA356283
- Publisher
- U.S. Department of Defense
- Number of pages
- 9
- Grant note
- Contract Number: N00014-96-1-1012
- Language
- English
- Date published
- 07/01/1998
- Academic Unit
- Physics and Astronomy; Electrical and Computer Engineering
- Record Identifier
- 9984442018002771
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