Impurity-Induced Bound Excitations on the Surface of Bi2Sr2CaCu2O8

Preprint

1 June 1999

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9906001

Abstract

We have probed the effects of atomic-scale impurities on superconductivity in Bi_{2}Sr_{2}CaCu_{2}O_{8} by performing low-temperature tunneling spectroscopy measurements with a scanning tunneling microscope. Our results show that non-magnetic 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 non-magnetic scattering in a d-wave superconductor.

Keywords

SUPERCONDUCTIVITY
BOUND EXCITATIONS
SCALE IMPURITIES
IMPURITY INDUCED
SUPERCONDUCTOR
INDUCED BOUND
BI2SR2CACU2O8
ATOMIC SCALE
TUNNELING

All Related Versions

Version 1, 1999-06-01, ArXiv
Published version: Physical Review Letters, 83 (1), 176.

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