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Self-assembly vicinal surface of Mo(001) grown on Al2O3(1102)

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5 Author(s)
Lai, J.H. ; Department of Physics, National Cheng Kung University, Tainan 701, Taiwan, Republic of China ; Tu, C.L. ; Su, S.H. ; Kuo, C.C.
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The structure and surface morphology of self-assembly vicinal surfaces (SAVSs) of Mo epitaxially grown on Al2O3(1102) substrates have been investigated by reflective high energy electron diffraction and scanning tunneling microscopy. The terrace edges for the Mo(001) SAVS are mainly arranged along [110]Mo||[1120]Al2O3 with a narrow distribution terrace width. The structural analyses show that the formation of the SAVS is due to a tilt growth of Mo(001) plane with respect to Al2O3(1102) substrate. By a simple geometric model, the tilt growth and SAVS of Mo(001) can be attributed to the asymmetric lattice mismatch between Mo(001) and Al2O3(1102) surfaces.

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Applied Physics Letters  (Volume:89 ,  Issue: 22 )