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ROLE OF REGULAR STEPS ON THE FORMATION OF MISSING-ROW RECONSTRUCTIONS - OXYGEN-CHEMISORPTION ON NI(771)
被引:31
作者:
HAASE, O
KOCH, R
BORBONUS, M
RIEDER, KH
机构:
[1] Fackbereich Physik, Freie Universität Berlin, D-1000 Berlin 33
关键词:
D O I:
10.1103/PhysRevLett.66.1725
中图分类号:
O4 [物理学];
学科分类号:
0702 ;
摘要:
Scanning tunneling microscopy and LEED reveal that on regularly stepped Ni(771) the oxygen-driven missing-row reconstruction of the (110) terraces proceeds in a very transparent manner: Substrate atoms can move to adjacent terraces without crossing steps, where they line up with remaining atom rows to form linear O-Ni chains. On the resulting double-width terraces perfect missing-row structures all over the surface are formed in contrast to flat Ni(110); to surmount the double-step barrier, elevated temperatures (greater-than-or-equal-to 250-degrees-C) are required.
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页码:1725 / 1728
页数:4
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