Tip Size Effect on the Appearance of a STM Image for Complex Surfaces: Theory versus Experiment for Si(111)-(7X7)

Y. L. Wang; H. J. Gao; H. M. Guo; H. W. Liu; I. G. Batyrev; W. E. McMahon; S. B. Zhang

doi:10.1103/PhysRevB.70.073312

Tip Size Effect on the Appearance of a STM Image for Complex Surfaces: Theory versus Experiment for Si(111)-(7X7)

Y. L. Wang, H. J. Gao, H. M. Guo, H. W. Liu, I. G. Batyrev, W. E. McMahon, S. B. Zhang

Chemistry and Nanoscience

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Abstract

Scanning tunneling microscopy experiment and first-principles total energy calculation are combined to determine STM images for Si(111)-7 X 7 to resolve the long-time discrepancy between theory and experiment. Our experiment resolves clearly and simultaneously the rest and adatom spots, in good agreement with theory, with the rest atom spots almost as bright as those of the central adatoms in the unfaulted-half of the unit cells. Theoretical study suggests that a geometric hindrance effect due to finite tip size could be responsible for the past experimental inability to observe the rest atoms.

Original language	American English
Article number	Article No. 073312
Pages (from-to)	073312-1-073312-4
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	70
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevB.70.073312 https://doi.org/10.1103/PhysRevB.70.073312
State	Published - Aug 2004

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NREL/JA-590-37461

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Wang, Y. L., Gao, H. J., Guo, H. M., Liu, H. W., Batyrev, I. G., McMahon, W. E., & Zhang, S. B. (2004). Tip Size Effect on the Appearance of a STM Image for Complex Surfaces: Theory versus Experiment for Si(111)-(7X7). Physical Review B - Condensed Matter and Materials Physics, 70(7), 073312-1-073312-4. Article Article No. 073312. https://doi.org/10.1103/PhysRevB.70.073312, https://doi.org/10.1103/PhysRevB.70.073312

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abstract = "Scanning tunneling microscopy experiment and first-principles total energy calculation are combined to determine STM images for Si(111)-7 X 7 to resolve the long-time discrepancy between theory and experiment. Our experiment resolves clearly and simultaneously the rest and adatom spots, in good agreement with theory, with the rest atom spots almost as bright as those of the central adatoms in the unfaulted-half of the unit cells. Theoretical study suggests that a geometric hindrance effect due to finite tip size could be responsible for the past experimental inability to observe the rest atoms.",

author = "Wang, {Y. L.} and Gao, {H. J.} and Guo, {H. M.} and Liu, {H. W.} and Batyrev, {I. G.} and McMahon, {W. E.} and Zhang, {S. B.}",

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Wang, YL, Gao, HJ, Guo, HM, Liu, HW, Batyrev, IG, McMahon, WE & Zhang, SB 2004, 'Tip Size Effect on the Appearance of a STM Image for Complex Surfaces: Theory versus Experiment for Si(111)-(7X7)', Physical Review B - Condensed Matter and Materials Physics, vol. 70, no. 7, Article No. 073312, pp. 073312-1-073312-4. https://doi.org/10.1103/PhysRevB.70.073312, https://doi.org/10.1103/PhysRevB.70.073312

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AU - Wang, Y. L.

AU - Gao, H. J.

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AU - Liu, H. W.

AU - Batyrev, I. G.

AU - McMahon, W. E.

AU - Zhang, S. B.

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AB - Scanning tunneling microscopy experiment and first-principles total energy calculation are combined to determine STM images for Si(111)-7 X 7 to resolve the long-time discrepancy between theory and experiment. Our experiment resolves clearly and simultaneously the rest and adatom spots, in good agreement with theory, with the rest atom spots almost as bright as those of the central adatoms in the unfaulted-half of the unit cells. Theoretical study suggests that a geometric hindrance effect due to finite tip size could be responsible for the past experimental inability to observe the rest atoms.

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Tip Size Effect on the Appearance of a STM Image for Complex Surfaces: Theory versus Experiment for Si(111)-(7X7)

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