TUNNEL SPECTROSCOPY INTO THE YBA2CU4O8 COMPOUND
We have realized planar tunnel junctions using both Y123 and Y124 single crystals as base electrodes and Pb as counterelectrode. The crystals, with Tc=90 K (Y123) and Tc=80 K (Y124), have been chemically etched and natural barriers were formed by a short air exposure. We have compared the tunneling...
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1994
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