Unique Rock-n-Roll Dynamic Appearance of a Ge-Si Ad-Dimer on Si(001)

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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{degree} 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.

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15 p.

Creation Information

LU,ZHONG-YI; LIU,FENG; WANG,CAI-ZHUANG; QIN,X.R.; SWARTZENTRUBER,BRIAN S.; LAGALLY,M.G. et al. July 24, 2000.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

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{degree} 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.

Physical Description

15 p.

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OSTI as DE00759997

Medium: P; Size: 15 pages

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  • Journal Name: Science; Other Information: Submitted to Science

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  • Report No.: SAND2000-1911J
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 759997
  • Archival Resource Key: ark:/67531/metadc704547

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  • July 24, 2000

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 7, 2017, 3:11 p.m.

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LU,ZHONG-YI; LIU,FENG; WANG,CAI-ZHUANG; QIN,X.R.; SWARTZENTRUBER,BRIAN S.; LAGALLY,M.G. et al. Unique Rock-n-Roll Dynamic Appearance of a Ge-Si Ad-Dimer on Si(001), article, July 24, 2000; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc704547/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.