Herz, Markus and Schiller, Christian H. and Giessibl, Franz J. and Mannhart, Jochen (2005) Simultaneous current-, force-, and work-function measurement with atomic resolution. Applied Physics Letters 86 (15), p. 153101.
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The local work function of a surface determines the spatial decay of the charge density at the Fermi level normal to the surface. Here, we present a method that enables simultaneous measurements of local work-function and tip-sample forces. A combined dynamic scanning tunneling microscope and atomic force microscope is used to measure the tunneling current between an oscillating tip and the sample in real time as a function of the cantilever’s deflection. Atomically resolved work-function measurements on a silicon (111)−(7×7) surface are presented and related to concurrently recorded tunneling current and force measurements.
|Institutions:||Physics > Institute of Experimental and Applied Physics > Chair Professor Giessibl > Group Franz J. Giessibl|
|Subjects:||500 Science > 530 Physics|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||10 Jul 2012 14:12|
|Last Modified:||10 Oct 2012 09:29|