Photoinduced superconducting nanowires in Gd-Ba-Cu-O films

Details Photoinduced superconducting nanowires in Gd-Ba-Cu-O films Photoinduced superconducting nanowires in Gd-Ba-Cu-O films

1998-03-04

arxiv.org/abs/cond-mat/9803056v1

Physics

Condensed Matter

Superconductivity

8 pages, 3 figures Submitted to Appl. Phys. Lett

Scientific paper

10.1063/1.121787

We report the fabrication of high Tc superconducting wires by photodoping a GdBa2Cu3O{6.5} thin film. An optical near-field probe was used to locally excite carriers in the system at room temperature. Trapping of the photogenerated electrons define a confining potential for the conducting holes in the CuO planes. Spatially resolved reflectance measurements show the photogenerated nanowires to be ~ 250 nm wide. Electron diffusion, before electron capture, is believed to be responsible for the observed width of the wires.

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