Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9841755 | Physica C: Superconductivity and its Applications | 2005 | 4 Pages |
Abstract
We have performed scanning tunneling microscopy and spectroscopy experiments on Bi2Sr1.57La0.43CuOy and Bi2Sr1.52Nd0.48CuOy. The atomic images showing the incommensurate modulated structure and the tunneling spectra have been successfully obtained at 4.2Â K. The observed superconducting gap values in both samples have evolved spatially on the length scale of about 20Â nm. This length scale is much longer than that reported in Bi2Sr2CaCu2Oy. The distribution of the gap value seems to originate from the inhomogeneous distribution of the lanthanide ions.
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Authors
T. Machida, N. Tsuji, H. Sakata,