Tunnel junctions on 1:2:4 YBaCuO single crystal

Journal article

We have studied the 1:2:4 phase of the YBaCuO compound by means of tunneling spectroscopy on single crystal based junctions. The crystals, with Tc≈80 K, have been chemically etched before the deposition of the counterelectrode in form of a thin film through a metallic mask. We have compared the tunneling spectra to those obtained on the Y123 system. The features at ±20 mV of the 1:2:3 phase are still observed in the 1:2:4 phase, while the low bias features at ±5 mV are not present in the tunneling characteristics of the Y124 compound. The experimental results are discussed in terms of the different CuO chain role in the Y123 and Y124 systems. © 1994.

Authors: Romano, P; Di Leo, R; Cucolo, A; Nigro, A; Dabrowski, B

• Journal: Physica C: Superconductivity and its applications
• Volume: 235-240
• Issue: PART 3
• Pages: 1913-1914
• Publication date: 1994-01-01
• DOI: 10.1016/0921-4534(94)92178-4
• ISSN: 0921-4534
• Language: English