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Anomalous magnetoresistance oscillations and enhanced superconductivity in single-crystal Pb nanobelts
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10.1063/1.2945280
/content/aip/journal/apl/92/23/10.1063/1.2945280
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/23/10.1063/1.2945280
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Figures

Image of FIG. 1.
FIG. 1.

(a) A scanning tunneling microscope image of the 28 ML atomically smooth Pb thin film on the substrate. The image was recorded at with a constant current of . (b) The schematic graph for the transport measurement across the Pb nanobelt. The four contact electrodes are made of indium. (c) A scanning electron micrograph (SEM) of the Pb nanobelt made of the Pb film shown in (a). The Pb nanobelt is 28 ML thick, wide and long. The dark region on the two sides of the Pb nanobelt is exposed Si surface, which isolates two blocks of the Pb film. The dimension in the length direction of the nanobelt is compressed since the SEM picture was taken at the 52° tilted sample stage in a FIB system.

Image of FIG. 2.
FIG. 2.

(a) Resistance as a function of temperature measured from the Pb film in Fig. 1(a) and the Pb nanobelt in Fig. 1(c), respectively. The vertical scale is normalized to the resistance at . The transition temperature of the Pb nanobelt is obvious higher than the of the Pb film. (b) Logarithm resistance vs temperature of a wide and 23 ML thick Pb nanobelt. Below , the resistance tail is obvious.

Image of FIG. 3.
FIG. 3.

(a) Magnetoresistance of the Pb film in Fig. 1(a) with a magnetic field applied perpendicular to the film at different temperatures. (b) Magnetoresistance of the Pb nanobelt in Fig. 1(c) with a magnetic field applied perpendicular to the film at different temperatures. (c) Close view of (b) in low magnetic field regime at for clarity. (d) Magnetoresistance oscillations of the Pb nanobelt in Fig. 1(c) at 2, 3, 4, 5 and , respectively, with both positive and negative perpendicular fields.

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/content/aip/journal/apl/92/23/10.1063/1.2945280
2008-06-13
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Anomalous magnetoresistance oscillations and enhanced superconductivity in single-crystal Pb nanobelts
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/23/10.1063/1.2945280
10.1063/1.2945280
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