Overhangs in the solid-on-solid model

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

Within the framework of a solid-on-solid model we have derived expressions for [110] and [010] step free energies of a simple square (001) surface. We show that at elevated temperatures overhangs in the steps cannot be ignored. With increasing temperature, the free energy curves of [110] and [010] steps nicely collapse onto each other. This means that (1) the two-dimensional equilibrium shape of an ad-atom island or vacancy island will exhibit a perfectly circular shape at elevated temperatures and (2) the step free energies vanishes at the same temperature leading to an isotropic thermal roughening of the (001) surface.
Original languageUndefined
Pages (from-to)142-145
Number of pages4
JournalPhysics letters A
Volume333
Issue number1-2
Publication statusPublished - 2004

Keywords

  • METIS-220908
  • IR-73071

Cite this

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title = "Overhangs in the solid-on-solid model",
abstract = "Within the framework of a solid-on-solid model we have derived expressions for [110] and [010] step free energies of a simple square (001) surface. We show that at elevated temperatures overhangs in the steps cannot be ignored. With increasing temperature, the free energy curves of [110] and [010] steps nicely collapse onto each other. This means that (1) the two-dimensional equilibrium shape of an ad-atom island or vacancy island will exhibit a perfectly circular shape at elevated temperatures and (2) the step free energies vanishes at the same temperature leading to an isotropic thermal roughening of the (001) surface.",
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author = "Zandvliet, {Henricus J.W.} and Bene Poelsema",
year = "2004",
language = "Undefined",
volume = "333",
pages = "142--145",
journal = "Physics letters A",
issn = "0375-9601",
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Overhangs in the solid-on-solid model. / Zandvliet, Henricus J.W.; Poelsema, Bene.

In: Physics letters A, Vol. 333, No. 1-2, 2004, p. 142-145.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Overhangs in the solid-on-solid model

AU - Zandvliet, Henricus J.W.

AU - Poelsema, Bene

PY - 2004

Y1 - 2004

N2 - Within the framework of a solid-on-solid model we have derived expressions for [110] and [010] step free energies of a simple square (001) surface. We show that at elevated temperatures overhangs in the steps cannot be ignored. With increasing temperature, the free energy curves of [110] and [010] steps nicely collapse onto each other. This means that (1) the two-dimensional equilibrium shape of an ad-atom island or vacancy island will exhibit a perfectly circular shape at elevated temperatures and (2) the step free energies vanishes at the same temperature leading to an isotropic thermal roughening of the (001) surface.

AB - Within the framework of a solid-on-solid model we have derived expressions for [110] and [010] step free energies of a simple square (001) surface. We show that at elevated temperatures overhangs in the steps cannot be ignored. With increasing temperature, the free energy curves of [110] and [010] steps nicely collapse onto each other. This means that (1) the two-dimensional equilibrium shape of an ad-atom island or vacancy island will exhibit a perfectly circular shape at elevated temperatures and (2) the step free energies vanishes at the same temperature leading to an isotropic thermal roughening of the (001) surface.

KW - METIS-220908

KW - IR-73071

M3 - Article

VL - 333

SP - 142

EP - 145

JO - Physics letters A

JF - Physics letters A

SN - 0375-9601

IS - 1-2

ER -