Photoinduced superconducting nanowires in Gd-Ba-Cu-O films
R. S. Decca, H. D. Drew, B. Maiorov, J. Guimpel, E. Osquiguil
Abstract
We report the fabrication of high Tc superconducting wires by photodoping a GdBa2Cu3O6.5 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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