Crucial role of vibrational entropy in the 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>Si</mml:mi><mml:mo>(</mml:mo><mml:mn>111</mml:mn><mml:mo>)</mml:mo><mml:mtext>−</mml:mtext><mml:mn>7</mml:mn><mml:mo>×</mml:mo><mml:mn>7</mml:mn></mml:mrow></mml:math>
 surface structure stability

Жачук, Р. А.; Coutinho, J.

doi:10.1103/physrevb.105.245306

Cited by 1 publication

(1 citation statement)

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“…Moreover, G. Binnig et al [25] were pioneers in determining the Si(111)-7 × 7 surface structure using scanning tunneling microscope (STM) measurements, further clarifying the stability of this surface structure. A recent study [26] analyzed the vibrational entropy of 3 × 3, 5 × 5, 7 × 7, and 9 × 9 structures of Si(111) using the first principles, revealing that the 7 × 7 structure exhibits greater stability at room temperature (RT). As a result, the Si(111)-7 × 7 surface is often selected as a substrate for depositing various metals due to its ability to provide stable interfaces with a wide range of structural and electronic properties.…”

Section: Introductionmentioning

confidence: 99%

Clarification of Au dimer adsorption sites on Si (111)-7 × 7 surface by AFM/KPFM

Guo,

Ren,

Shu

et al. 2024

Phys. Scr.

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Atomic-scale surface adsorption has been a significant research topic in recent years, with a particular emphasis on the adsorption properties of Au/Si(111)-7×7, which are vitally important for pioneering future novel semiconductor devices. Here, we studied the adsorption of Au dimer on the Si(111)-7×7 surface with atomic resolution using non-contact atomic force microscopy and Kelvin probe force microscopy at room temperature. Our results show that the Au dimer adsorbs in the vicinity of the Si rest atoms, displaying auniquelocalized electron distribution.In density functional theory calculations, three candidate Au dimer adsorption sites have been identified, and the most stable Au dimer adsorption site corresponds with experiments. Furthermore, the local electron transfer of Au dimer adsorption has been analyzed, affirming the electron distribution around the Au dimer adsorption site. This research reveals that the structure and charge transfer of adsorbed Au dimers on Si(111)-7×7 provide insight into the mechanism of the metal-semiconductor system.

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Section: Introductionmentioning

confidence: 99%