Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5424276 | Surface Science | 2009 | 5 Pages |
Abstract
Hexagonal-pillar shaped pure Fe single crystal whiskers with six {1Â 1Â 0} side planes were obtained by means of chemical vapor deposition. Atomically resolved scanning tunneling microscopy images obtained on the {1Â 1Â 0} surface showed a quasi-hexagonal atomic array with mesoscopic-range periodic height modulation of about 1/3 of an atomic step. This height modulation was found to be a result of an interference between the quasi-hexagonal top-layer and the sub-surface bcc-Fe{1Â 1Â 0} layer. Unit vectors of the mesoscopic-range modulation turned out to be expressed as p1âp2â=131-214u1âu2â=121-315s1âs2â, where u1âu2â and s1âs2â are the primitive vectors of the two-dimensional atomic array in the top-layer and those in the sub-surface layer, respectively. The two-dimensional density of atoms in the top-layer is slightly higher by 0.46% than that in the sub-surface layer.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
T.K. Yamada, H. Tamura, M. Shishido, T. Irisawa, T. Mizoguchi,