Analysis of scanning tunneling microscopy feedback system: Experimental determination of parameters
作者:
E. Anguiano,
A. I. Oliva,
M. Aguilar,
J. L. Pen˜a,
期刊:
Review of Scientific Instruments
(AIP Available online 1996)
卷期:
Volume 67,
issue 8
页码: 2947-2952
ISSN:0034-6748
年代: 1996
DOI:10.1063/1.1147077
出版商: AIP
数据来源: AIP
摘要:
We describe the experimental work necessary on a scanning tunneling microscopy (STM) system to obtain some important feedback parameters—to have stability and good imaging conditions—such as the mechanical resonance frequency &ohgr;0, the delay time &tgr;, and the damping factor &zgr;. We study and analyze each one of the main components involved on the STM such as the feedback system, the piezoelectric elements, the rigidity of the mechanical structure (the mechanical resonance), and its relation with the scanning rate for imaging. We conclude that it is necessary to obtain these parameters with the STM in tunnel conditions, in order to consider the effects of the tip, surface contamination, and tip sample interaction. We also conclude that tripod based STM can be better than STM based on piezo tubes scanners. ©1996 American Institute of Physics.
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