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Superconducting properties of ultrathin single crystals
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) Schematic view of the patterning steps for the microcrystal and a bridge in the center.

Image of FIG. 2.
FIG. 2.

(Color online) [(a) and (b)] Optical images of a sample illuminated from the top and bottom respectively. Indicated in the images are (I) the gold contact, (II) the Bi2212 microbridge, (III) the layer, and (IV) the substrate. All the gold contacts and the microbridge are protected by , except for the rectangle in the middle of the bridge.

Image of FIG. 3.
FIG. 3.

(Color online) The AFM image over an area of on a Bi2212 microbridge. The thickness of the bridge is about . The inset shows the surface profile along an arbitrarily chosen direction.

Image of FIG. 4.
FIG. 4.

(Color online) curves of a (BSCCO) microbridge with the open area after subsequent etching times. The initial thickness of the bridge is less than .

Image of FIG. 5.
FIG. 5.

(Color online) Resistance of the microbridge vs the etching time (dots) fitted by (solid line). Best-fit parameters are shown in the inset. was measured in seperate experiments.

Image of FIG. 6.
FIG. 6.

(Color online) Variation of with the thickness of the bridge (number of unit cells) in -axis direction.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Superconducting properties of ultrathin Bi2Sr2CaCu2O8+x single crystals