Abstract
The quality of the tunneling spectroscopy of Bi2Sr2CaCu2O8 can be improved significantly by tunneling into the edge of a single crystal, as opposed to directly into a cleaved face. This junction geometry allows tunneling exclusively in the a-b plane, and we will discuss some features that can be reproduced consistently with this technique. This experimental approach also provides us a unique opportunity to observe the gap anisotropy within the a-b plane. We find that the energy gap (Δab) varies from 20 meV to 40 meV, with the maximum value along the orthorhombic crystal axes and the minimum value along the CuO bond direction. No nodal line has been observed, possibly due to the limitation in angular resolution of the tunneling technique.
Original language | English |
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Pages (from-to) | 1877-1878 |
Number of pages | 2 |
Journal | Physica C: Superconductivity and its Applications |
Volume | 235-240 |
Issue number | PART 3 |
DOIs | |
State | Published - Dec 1994 |
Bibliographical note
Funding Information:*Research supported by NSF grants DMR-9303728 High quality BSCCO 2212 single crystals are provtded by Farun Lu and Professor E L Wolf m Polytechruc Umverslty, New York. We want to thank Prof. C Brock in the ChcmL,,try Department (Umvcrslty of Kentucky) ft, r performing X-ray dtffracllon mea~ureraent-~ for us
Funding
*Research supported by NSF grants DMR-9303728 High quality BSCCO 2212 single crystals are provtded by Farun Lu and Professor E L Wolf m Polytechruc Umverslty, New York. We want to thank Prof. C Brock in the ChcmL,,try Department (Umvcrslty of Kentucky) ft, r performing X-ray dtffracllon mea~ureraent-~ for us
Funders | Funder number |
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National Science Foundation (NSF) | DMR-9303728 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering