Surface modification of YBa2Cu3Oy thin films with a scanning tunneling microscope
- 15 August 1994
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 76 (4) , 2535-2537
- https://doi.org/10.1063/1.357566
Abstract
We report a systematic modification of thin YBa2Cu3O y films with a scanning tunneling microscope. The samples include YBa2Cu3O y films on MgO(001) and YBa2Cu3O y /PrBa2Cu3O y bilayer films on SrTiO3 (001). The bias voltage of the tip was kept negative and varied from −600 to −1200 mV. The tip was operated in a constant tunneling current mode with tunneling current 0.3–0.7 nA and scanning rate 1 Hz. Modification of the surface begins with nucleation of holes, or at the edge of a dislocation or protrusion on the surface, and is achieved by successively scanning a fixed area. We show the image obtained from an atomic force microscope which can help us look into the mechanism of the modification.This publication has 10 references indexed in Scilit:
- Insulating nanoparticles on YBa2Cu3O7−δ thin films revealed by comparison of atomic force and scanning tunneling microscopyApplied Physics Letters, 1993
- Growth of high-T c YBa2Cu3Oy films with an off-axis sputtering configurationJournal of Applied Physics, 1993
- Energy gap and surface structure of probed by scanning tunneling microscopyPhysical Review Letters, 1992
- Etching of screw dislocations in YBa2Cu3O7 films with a scanning tunneling microscopeApplied Physics Letters, 1992
- Preparation of YBa2Cu3O7−δ thin films with thickness gradients and investigations of growth stages by scanning tunneling microscopyApplied Physics Letters, 1992
- Scanning tunneling microscope surface imaging and etching of single crystals of the high-temperature superconductor Tl2Ba2CuO6+δApplied Physics Letters, 1991
- Fabrication of nanometer flat areas onto YBa2Cu3O7−x thin film surfaces by scanning tunneling microscopeJournal of Applied Physics, 1991
- Scanning tunneling microscopy of the surface topography and surface etching of nanoscale structures on the high-temperature superconductorsJournal of Applied Physics, 1991
- Growth Mechanism of Sputtered Films of YBa 2 Cu 3 O 7 Studied by Scanning Tunneling MicroscopyScience, 1991
- Topographic study of the (001) surface of YBa2Cu3O7 single crystals with a scanning tunneling microscopePhysica C: Superconductivity and its Applications, 1988