Superstructure in the termination of CoO(111) surfaces : Low-energy electron diffraction and scanning tunneling microscopy
Superstructure in the termination of CoO(111) surfaces : Low-energy electron diffraction and scanning tunneling microscopy
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CoO(111) 表面终止的超结构：低能电子衍射和扫描隧道显微镜
DOI：
10.1103/physrevb.79.121403
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发表时间：
2009
影响因子：
3.7
通讯作者：
K. Heinz
中科院分区：
文献类型：
--
作者：
W. Meyer;K. Biedermann;M. Gubo;L. Hammer;K. Heinz
The surface structures of CoO(111) films epitaxially grown on $\text{Ir}(100)\ensuremath{-}(1\ifmmode\times\else\texttimes\fi{}1)$ are investigated by means of quantitative low-energy electron diffraction and scanning tunneling microscopy. A $(\sqrt{3}\ifmmode\times\else\texttimes\fi{}\sqrt{3})R30\ifmmode^\circ\else\textdegree\fi{}$ superstructure is revealed for the films' ground states. It appears for film thicknesses $\ensuremath{\ge}10\text{ }\text{\AA{}}$ both for strained and unstrained films and so most likely applies also to the (111) surface of a bulk CoO crystal. The superstructure is interpreted as a stress-relieving reaction to the switch from rocksalt-type to wurtzite-type stacking below the surface which has been detected earlier.
The surface structures of CoO(111) films epitaxially grown on $\text{Ir}(100)\ensuremath{-}(1\ifmmode\times\else\texttimes\fi{}1)$ are investigated by means of quantitative low-energy electron diffraction and scanning tunneling microscopy. A $(\sqrt{3}\ifmmode\times\else\texttimes\fi{}\sqrt{3})R30\ifmmode^\circ\else\textdegree\fi{}$ superstructure is revealed for the films' ground states. It appears for film thicknesses $\ensuremath{\ge}10\text{ }\text{\AA{}}$ both for strained and unstrained films and so most likely applies also to the (111) surface of a bulk CoO crystal. The superstructure is interpreted as a stress-relieving reaction to the switch from rocksalt-type to wurtzite-type stacking below the surface which has been detected earlier.