Unique Dynamic Appearance of a Ge-Si Ad-dimer on Si(001)

Zhong Yi Lu; Feng Liu; Cai Zhuang Wang; X. R. Qin; B. S. Swartzentruber; M. G. Lagally; Kai Ming Ho

doi:10.1103/PhysRevLett.85.5603

Unique Dynamic Appearance of a Ge-Si Ad-dimer on Si(001)

Zhong Yi Lu
, Feng Liu
, Cai Zhuang Wang
, X. R. Qin
, B. S. Swartzentruber
, M. G. Lagally
, Kai Ming Ho

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

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. © 2000 The American Physical Society.

Original language	English
Pages (from-to)	5603-5606
Number of pages	4
Journal	Physical Review Letters
Volume	85
Issue number	26
DOIs	https://doi.org/10.1103/PhysRevLett.85.5603
State	Published - Jan 1 2000
Externally published	Yes

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title = "Unique Dynamic Appearance of a Ge-Si Ad-dimer on Si(001)",

abstract = "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 {\textquotedblleft}rocking{\textquotedblright} 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. {\textcopyright} 2000 The American Physical Society.",

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T1 - Unique Dynamic Appearance of a Ge-Si Ad-dimer on Si(001)

AU - Lu, Zhong Yi

AU - Liu, Feng

AU - Wang, Cai Zhuang

AU - Qin, X. R.

AU - Swartzentruber, B. S.

AU - Lagally, M. G.

AU - Ho, Kai Ming

PY - 2000/1/1

Y1 - 2000/1/1

N2 - 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. © 2000 The American Physical Society.

AB - 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. © 2000 The American Physical Society.

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DO - 10.1103/PhysRevLett.85.5603

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EP - 5606

JO - Physical Review Letters

JF - Physical Review Letters

IS - 26

ER -

Unique Dynamic Appearance of a Ge-Si Ad-dimer on Si(001)

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