The instability of silicene on Ag(111)

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Abstract

We have used low energy electron microscopy to directly visualize the formation and stability of silicene layers on a Ag(111) substrate. Theoretical calculations call into question the stability of this graphene-like analog of silicon. We find that silicene layers are intrinsically unstable against the formation of an “sp3-like” hybridized, bulk-like silicon structure. The irreversible formation of this bulk-like structure is triggered by thermal Si adatoms that are created by the silicene layer itself. To add injury to insult, this same instability prevents the formation of a fully closed silicene layer or a thicker bilayer, rendering the future large-scale fabrication of silicene layers on Ag substrates unlikely
Original languageEnglish
Article number263119
Pages (from-to)263119-1-263119-4
JournalApplied physics letters
Volume103
Issue number26
DOIs
Publication statusPublished - 2013

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silicon
adatoms
electron microscopy
graphene
analogs
fabrication
energy

Keywords

  • METIS-300292
  • IR-90072

Cite this

Acun, Adil ; Poelsema, Bene ; Zandvliet, Henricus J.W. ; van Gastel, Raoul. / The instability of silicene on Ag(111). In: Applied physics letters. 2013 ; Vol. 103, No. 26. pp. 263119-1-263119-4.
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The instability of silicene on Ag(111). / Acun, Adil; Poelsema, Bene; Zandvliet, Henricus J.W.; van Gastel, Raoul.

In: Applied physics letters, Vol. 103, No. 26, 263119, 2013, p. 263119-1-263119-4.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - The instability of silicene on Ag(111)

AU - Acun, Adil

AU - Poelsema, Bene

AU - Zandvliet, Henricus J.W.

AU - van Gastel, Raoul

PY - 2013

Y1 - 2013

N2 - We have used low energy electron microscopy to directly visualize the formation and stability of silicene layers on a Ag(111) substrate. Theoretical calculations call into question the stability of this graphene-like analog of silicon. We find that silicene layers are intrinsically unstable against the formation of an “sp3-like” hybridized, bulk-like silicon structure. The irreversible formation of this bulk-like structure is triggered by thermal Si adatoms that are created by the silicene layer itself. To add injury to insult, this same instability prevents the formation of a fully closed silicene layer or a thicker bilayer, rendering the future large-scale fabrication of silicene layers on Ag substrates unlikely

AB - We have used low energy electron microscopy to directly visualize the formation and stability of silicene layers on a Ag(111) substrate. Theoretical calculations call into question the stability of this graphene-like analog of silicon. We find that silicene layers are intrinsically unstable against the formation of an “sp3-like” hybridized, bulk-like silicon structure. The irreversible formation of this bulk-like structure is triggered by thermal Si adatoms that are created by the silicene layer itself. To add injury to insult, this same instability prevents the formation of a fully closed silicene layer or a thicker bilayer, rendering the future large-scale fabrication of silicene layers on Ag substrates unlikely

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KW - IR-90072

U2 - 10.1063/1.4860964

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