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(Color online) (a) Scanning tunneling microscope image of the 23 ML atomically flat Pb thin film. (b) vs curve measured from the Pb film in (a), showing a sharp superconductivity transition at . (c) Scanning electron micrograph of the fractal-like Pb film. The dark regions are the Si substrate and the gray and white ones are the Pb film. (d) vs curve of the fractal-like Pb film shown in (c).
Magnetoresistance of (a) the fractal-like Pb film and (b) the single crystal Pb film with a magnetic field applied perpendicular to the film, measured at the temperatures of 2 and , respectively.
(Color online) (a) Magnetoresistance of the fractal-like Pb film at different temperatures. (b) Close view of (a) near zero magnetic field for clarity.
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