Abstract
We have probed the effects of atomic-scale impurities on superconductivity in Bi2Sr2CaCu2O8 by performing low-temperature tunneling spectroscopy measurements with a scanning tunneling microscope. Our results show that nonmagnetic defect structures at the surface create localized low-energy excitations in their immediate vicinity. The impurity-induced excitations occur over a range of energies, including the middle of the superconducting gap, at the Fermi level. Such a zero bias state is a predicted feature for strong nonmagnetic scattering in a d-wave superconductor.
Original language | English (US) |
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Pages (from-to) | 176-179 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 83 |
Issue number | 1 |
DOIs | |
State | Published - 1999 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy