| Issue |
J. Phys. Colloques
Volume 48, Number C6, Novembre 1987
34th International Field Emission Symposium / 34ème Symposium International d'Emission de Champ
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|---|---|---|
| Page(s) | C6-85 - C6-90 | |
| DOI | https://doi.org/10.1051/jphyscol:1987614 | |
34th International Field Emission Symposium / 34ème Symposium International d'Emission de Champ
J. Phys. Colloques 48 (1987) C6-85-C6-90
DOI: 10.1051/jphyscol:1987614
Department of Applied Physics, Tohoku University, Sendai 980, Japan
J. Phys. Colloques 48 (1987) C6-85-C6-90
DOI: 10.1051/jphyscol:1987614
EFFECT OF TIP-SIZE ON STM IMAGES OF GRAPHITE
C. Horie et H. MiyazakiDepartment of Applied Physics, Tohoku University, Sendai 980, Japan
Abstract
By using our simple model of a tunneling current in the scanning tunneling microscopy (STM), we investigate how the STM images of graphite are related to the size of the tip. In our model, the tunneling current is calculated by replacing the tip and the two distinct carbon atoms in the top layer of graphite by appropriate sectional areas effective to the tunneling current, respectively. It is shown that the STM images show a threefold symmetry, and vary depending on the effective size of the tip.