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Atomic-layer-resolved local work functions of Pb thin films and their dependence on quantum well states
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10.1063/1.2403926
/content/aip/journal/apl/90/1/10.1063/1.2403926
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/1/10.1063/1.2403926
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) STM image of a Pb island taken at and . Image size: . Insert is a atomic resolution image (, ). (b) A line plot along the blue line in (a) to show the height profile. (c) The topographic and (d) local work function images taken simultaneously (, ). The bright area has a larger work function than the dark area. Image size: .

Image of FIG. 2.
FIG. 2.

(Color online) (a) Measured Pb local work function (LWF), showing a strong dependence on local film thickness N. Inset is the theoretical prediction in Ref. 19. (b) A comparison of the LWF measured with modulation bias of , modulation distance of and that with modulation bias of and modulation distance of .

Image of FIG. 3.
FIG. 3.

(Color online) curve of Pb films between and 26 ML (without counting the wetting layer). The measurement was done at with sample bias ramp from . Same shape triangles are used here to indicate the shifts of the peak positions as a function of , whereas upward triangles indicate the QWS peaks near the Fermi level.

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/content/aip/journal/apl/90/1/10.1063/1.2403926
2007-01-03
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Atomic-layer-resolved local work functions of Pb thin films and their dependence on quantum well states
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/1/10.1063/1.2403926
10.1063/1.2403926
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