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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Cucolo, A.M. Di Leo, R. Nigro, A. Licci, F. Colino, J. |
| Copyright Year | 2002 |
| Abstract | The authors have measured the tunneling characteristics of planar junctions realized on YBa/sub 2/(Cu/sub 1-x/Fe/sub x/)/sub 3/O/sub y/ single crystals with x=0.04. In comparison with the undoped 90 K phase of this material, the conductance curves of the doped junctions show gap-like structures broadened and reduced in amplitude. This behavior is similar to what has been observed in junctions fabricated on YBa/sub 2/Cu/sub 3/O/sub 7- delta / single crystals with T/sub c/=60 K. At low temperatures the background conductance is linear up to about 100 mV and shows a parabolic behavior for higher voltages, as found in the undoped 90 K system. From the analysis of the parabola, the barrier height and thickness are deduced. In the doped junctions anomalies are frequently observed as a conductance peak centered at zero-bias. They appear to result from scattering that involves spin exchange between tunneling electrons and Fe ions localized at the metal-oxide interface.< |
| Sponsorship | Council on Superconductivity Appl. Superconductivity Conference Inc MIT |
| Starting Page | 1312 |
| Ending Page | 1315 |
| Page Count | 4 |
| File Size | 492054 |
| File Format | |
| ISSN | 10518223 |
| Volume Number | 3 |
| Issue Number | 1 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1993-03-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Tunneling Iron Crystals Voltage Yttrium barium copper oxide Crystalline materials Bars Conductivity Lattices Chemicals |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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