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||Simulation of STM images of 3D surfaces and
comparison with experimental data:
||Computer simulation by numerically solving the time-dependent Schrödinger equation was used to
investigate image formation during scanning tunneling microscope (STM) imaging of
three-dimensional objects with radii of curvature comparable with that of the STM tip. The results
were compared with experiment. When the nanotube is placed on a substrate with similar electronic
structure, the only distortion arises from geometric convolution. When the substrate and the nanotube
have different electronic structures, additional distortions arise. The time evolution of the tunneling
process shows that in the interpretation of the scanning tunneling spectroscopy data one has to take
into account the nanotube not being an integral part of the underlying substrate.
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