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Scanning tunneling microscopy study of surface morphology and tunneling spectroscopy on YBa2Cu3O7−δ thin films

✍ Scribed by C.S. Chuang; H.T. Chen; T.T. Chen

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
608 KB
Volume
220
Category
Article
ISSN
0921-4534

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✦ Synopsis

The temporal evolution of the scanning tunneling microscope image of a c-axis laser-ablated YBa2Cu3OT_z film on a MgO substrate was studied at room temperature in air. The tunneling spectra of the junctions with Au, Pb, Pt-Ir or W tip-YBCO films were measured at liquid-helium temperature. A gap-like structure at 9-12 mV was observed.

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The growth mechanism and surface topography of YBazCus07\_s (YBCO) and BiSrCaCuO-2201 (BSCCO) epitaxially grown superconducting films have been studied by scanning tunneling microscopy. We report here two growth mechanisms: screw dis location growth and layered growth, and also the surface character