Unique Rock-n-Roll Dynamic Appearance of a Ge-Si Ad-Dimer on Si(001) [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 2000.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 15 pages : digital, PDF file
Additional Creators:: Sandia National Laboratories, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

The authors carry out a comparative study of the energetic and dynamics of Si-Si, Ge-Ge, and Ge-Si ad-dimers on top of a dimer row in the Si(001) surface, using first-principles calculations. The dynamic appearance of a Ge-Si dimer is distinctively different from that of a Si-Si or Ge-Ge dimer, providing a unique way for its identification by scanning tunneling microscopy (STM). Its rocking motion, observed in STM, actually reflects a 180° rotation of the dimer, involving a piecewise-rotation mechanism. The calculated energy barrier of 0.74 eV is in good agreement with the experimental value of 0.82 eV.

Report Numbers:

E 1.99:sand2000-1911j
sand2000-1911j

Subject(s):

Materials Science

Other Subject(s):

Note:

Published through SciTech Connect.
07/24/2000.
"sand2000-1911j"
Science FT
HO,KAI-MING; SWARTZENTRUBER,BRIAN S.; LAGALLY,M.G.; QIN,X.R.; LIU,FENG; LU,ZHONG-YI; WANG,CAI-ZHUANG.

Funding Information:

AC04-94AL85000

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