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Impurity-Induced Bound Excitations on the Surface of Bi2Sr2CaCu2O8 | | Ali Yazdani
; C. M. Howald
; C. P. Lutz
; A. Kapitulnik
; D. M. Eigler
; | | Date: |
1 Jun 1999 | | Subject: | Superconductivity; Strongly Correlated Electrons | cond-mat.supr-con cond-mat.str-el | | Affiliation: | 1,2), C. M. Howald, C. P. Lutz, A. Kapitulnik, and D. M. Eigler (Department of Physics, University of Illinois at Urbana-Champaign IBM Research Division, Almaden Research Center Department of Applied Physics, Stanford University | | 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. | | Source: | arXiv, cond-mat/9906001 | | Services: | Forum | Review | PDF | Favorites | |
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