Electronic Structure of Impurities and Vortices in Short Coherence Length Superconductors
Abstract
This is a report of progress in theoretical calculations of scanning tunneling microscopy spectra near impurities in superconductors. A previously-developed Green's function technique is applied to superconductors with anisotropic gaps, such as d-wave or extended s-wave. Calculations 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1998
- Accession Number
- ADA356283
Entities
People
- Michael E. Flatté
Organizations
- University of Iowa