Unique dynamic appearance of a Ge-Si Ad-dimer on Si(001)

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Publication Type Journal Article
School or College College of Engineering
Department Materials Science & Engineering
Creator Liu, Feng
Other Author Lu, Zhong-Yi; Wang, Cai-Zhuang; Qin, X. R.; Swartzentruber, B. S.; Lagally, M. G.; Ho, Kai-Ming
Title Unique dynamic appearance of a Ge-Si Ad-dimer on Si(001)
Date 2000-12
Description We carry out a comparative study of the energetics 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.
Type Text
Publisher American Physical Society
Journal Title Physical Review Letters
Volume 85
Issue 26
First Page 5603
Last Page 5606
DOI 10.1103/PhysRevLett.85.5603
citatation_issn 0031-9007
Subject Ge-Si Ad-dimer; Si(001); First-principles calculations; Energetics
Subject LCSH Epitaxy; Molecular dynamics; Dimers
Language eng
Bibliographic Citation Lu, Z. Y., Liu, F., Wang, C. Z., Qin, X. R., Swartzentruber, B. S., Lagally, M. G., & Ho, K. M. (2000). Unique dynamic appearance of a Ge-Si Ad-dimer on Si(001). Physical Review Letters, 85(26), 5603-6.
Rights Management (c) American Physical Society http://dx.doi.org/10.1103/PhysRevLett.85.5603
Format Medium application/pdf
Format Extent 282,093 bytes
Identifier ir-main,12191
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Reference URL https://collections.lib.utah.edu/ark:/87278/s6ns1c99