(Color online) Schematic view of the patterning steps for the microcrystal and a bridge in the center.
(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.
(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.
(Color online) curves of a (BSCCO) microbridge with the open area after subsequent etching times. The initial thickness of the bridge is less than .
(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.
(Color online) Variation of with the thickness of the bridge (number of unit cells) in -axis direction.
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