Atomic Structure of Si(111)-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo>(</mml:mo><mml:mn>5</mml:mn><mml:mo>×</mml:mo><mml:mn>2</mml:mn><mml:mo>)</mml:mo></mml:math>-Au from High Resolution Electron Microscopy and Heavy-Atom Holography

Marks, Laurence D.; Plass, R.

doi:10.1103/physrevlett.75.2172

Cited by 90 publications

(61 citation statements)

References 19 publications

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“…This was later confirmed by HREM [32] and seems to be firmly established. The gold chains run along the [110] and equivalent directions (parallel to the ×2 periodicity of the unit cell).…”

Section: Introductionsupporting

confidence: 54%

“…Many of them could be ruled out on the bases of more detailed STM studies [24] and the knowledge of the exact gold coverage [17]. A few more refined models exist [25,32]. They consider both the position of the gold atoms on the substrate and the rebonding of the silicon atoms in the surface layer.…”

Section: Introductionmentioning

confidence: 99%

“…It was first discovered about thirty years ago [18,19,20] and has been investigated using many experimental techniques since then. This includes low energy electron diffraction (LEED) studies [18,19,20], x-ray diffraction [21] and x-ray standing wave analysis [22], scanning tunneling microscopy (STM) [23,24,25], angle resolved photoemission spectroscopy (ARPES) [26,27,28,29,30] and inverse photoemission [31], and high resolution electron microscopy (HREM) combined with heavy-atom holography [32].…”

Section: Introductionmentioning

confidence: 99%

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First-principles study of the atomic and electronic structure of theSi(111)−(5×2)−Ausurface reconstructio

Riikonen

Sánchez‐Portal

2005

Phys. Rev. B

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We present a systematic study of the atomic and electronic structure of the Si( 111)-(5×2)-Au reconstruction using first-principles electronic structure calculations based on the density functional theory. We analyze the structural models proposed by Plass [Phys. Rev. Lett. 75, 2172 (1995)], those proposed recently by Erwin [Phys. Rev. Lett. 91, 206101 (2003)], and a completely new structure that was found during our structural optimizations. We study in detail the energetics and the structural and electronic properties of the different models. For the two most stable models, we also calculate the change in the surface energy as a function of the content of silicon adatoms for a realistic range of concentrations. Our new model is the energetically most favorable in the range of low adatom concentrations, while Erwin's "5×2" model becomes favorable for larger adatom concentrations. The crossing between the surface energies of both structures is found close to 1/2 adatoms per 5×2 unit cell, i.e. near the maximum adatom coverage observed in the experiments. Both models, the new structure and Erwin's "5×2" model, seem to provide a good description of many of the available experimental data, particularly of the angle-resolved photoemission measurements.

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“…This was later confirmed by HREM [32] and seems to be firmly established. The gold chains run along the [110] and equivalent directions (parallel to the ×2 periodicity of the unit cell).…”

Section: Introductionsupporting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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First-principles study of the atomic and electronic structure of theSi(111)−(5×2)−Ausurface reconstructio

Riikonen

Sánchez‐Portal

2005

Phys. Rev. B

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“…This method has been used for four systems, (7 Â 7) on silicon (111) [41], 5 Â 2-Au on silicon (111) [46], 2 Â 1 on SrTiO 3 [26] and c(6 Â 2) on SrTiO3 (001) [34], successfully. However, there are restrictions, the first being on the thickness of the sample.…”

Section: Discussionmentioning

confidence: 99%

“…TEM is used in two different modes, plan view [40][41][42][43][44][45][46][47][48][49][50] and profile view [48,49,, with respect to the orientation of the sample surface. Imaging of nanoparticle surfaces is more suited to profile view imaging as has been demonstrated for gold and silver particles [51][52][53][54][55][56][57][58][59][60][61][62][63] and more recently for oxide nanoparticles [72,73].…”

Section: Introductionmentioning

confidence: 99%

When does atomic resolution plan view imaging of surfaces work?

et al. 2016

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a b s t r a c tSurface structures that are different from the corresponding bulk, reconstructions, are exceedingly difficult to characterize with most experimental methods. Scanning tunneling microscopy, the workhorse for imaging complex surface structures of metals and semiconductors, is not as effective for oxides and other insulating materials. This paper details the use of transmission electron microscopy plan view imaging in conjunction with image processing for solving complex surface structures. We address the issue of extracting the surface structure from a weak signal with a large bulk contribution. This method requires the sample to be thin enough for kinematical assumptions to be valid. The analysis was performed on two sets of data, c(6 Â 2) on the (100) surface and (3 Â 3) on the (111) surface of SrTiO 3 , and was unsuccessful in the latter due to the thickness of the sample and a lack of inversion symmetry. The limits and the functionality of this method are discussed.

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