Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 78, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2794062
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- Austrian Science Fund (FWF) [F 2508] Funding Source: researchfish
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In most atomic force microscopes (AFMs), the motion of the tip is detected by the deflection of a laser beam shining onto the cantilever. AFM applications such as scanning capacitance spectroscopy or photocurrent spectroscopy, however, are severely disturbed by the intense stray light of the AFM laser. For this reason, an intercepted feedback method was developed, which allows to switch off the laser temporarily while the feedback loop keeps running. The versatility of this feedback method is demonstrated by measuring tip-force dependent Schottky barrier heights on GaAs samples. (C) 2007 American Institute of Physics.
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