Abstract
We report scanning tunneling spectroscopy imaging of the vortex lattice in single crystalline . By tunneling parallel to the axis, a single superconducting gap () associated with the band is observed. The vortices in the band have a large core size compared to estimates based on and show an absence of localized states in the core. Furthermore, superconductivity between the vortices is rapidly suppressed by an applied field. These results suggest that superconductivity in the band is, at least partially, induced by the intrinsically superconducting band.
- Received 14 June 2002
DOI:https://doi.org/10.1103/PhysRevLett.89.187003
©2002 American Physical Society