Observations of anisotropic electron scattering on graphite with a low-temperature scanning tunneling microscope

Low-temperature scanning tunneling microscopy was used in studying the anisotropic scattering from point defects on the surface of graphite. The experiments were done using an ultrahigh-vacuum STM at 77 K. The experimental results obtained were in close agreement with theoretical calculations made by Mizes and Foster. The images are similar with those of three-fold scattering using a C60-functionalized probe tip at room temperature.