(2x1)-(1x1) Phase Transition on Ge(001): Dimer Breakup and Surface Roughening

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Abstract

Using low energy electron microscopy, we have investigated the (2×1)-(1×1) phase transition occurring above 925 K on Ge(001). Dimer breakup has been identified as the physical origin of this transition. A quantitative description of the dimer concentration during the transition involves configuration entropy of random monomers within the dimer matrix. The dimer formation energy amounts to 1.2±0.3  eV. Dimer breakup promotes reversible surface disorder by step proliferation and irreversible surface roughening above 1130 K.
Original languageEnglish
Pages (from-to)116102-1-116102-4
Number of pages4
JournalPhysical review letters
Volume91
Issue number11
DOIs
Publication statusPublished - 2003

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dimers
energy of formation
electron microscopy
monomers
disorders
entropy
matrices
configurations
energy

Keywords

  • IR-61189
  • METIS-214533

Cite this

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abstract = "Using low energy electron microscopy, we have investigated the (2×1)-(1×1) phase transition occurring above 925 K on Ge(001). Dimer breakup has been identified as the physical origin of this transition. A quantitative description of the dimer concentration during the transition involves configuration entropy of random monomers within the dimer matrix. The dimer formation energy amounts to 1.2±0.3  eV. Dimer breakup promotes reversible surface disorder by step proliferation and irreversible surface roughening above 1130 K.",
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author = "{van Vroonhoven}, E. and Zandvliet, {Henricus J.W.} and Bene Poelsema",
year = "2003",
doi = "10.1103/PhysRevLett.91.116102",
language = "English",
volume = "91",
pages = "116102--1--116102--4",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
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}

(2x1)-(1x1) Phase Transition on Ge(001) : Dimer Breakup and Surface Roughening. / van Vroonhoven, E.; Zandvliet, Henricus J.W.; Poelsema, Bene.

In: Physical review letters, Vol. 91, No. 11, 2003, p. 116102-1-116102-4.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - (2x1)-(1x1) Phase Transition on Ge(001)

T2 - Dimer Breakup and Surface Roughening

AU - van Vroonhoven, E.

AU - Zandvliet, Henricus J.W.

AU - Poelsema, Bene

PY - 2003

Y1 - 2003

N2 - Using low energy electron microscopy, we have investigated the (2×1)-(1×1) phase transition occurring above 925 K on Ge(001). Dimer breakup has been identified as the physical origin of this transition. A quantitative description of the dimer concentration during the transition involves configuration entropy of random monomers within the dimer matrix. The dimer formation energy amounts to 1.2±0.3  eV. Dimer breakup promotes reversible surface disorder by step proliferation and irreversible surface roughening above 1130 K.

AB - Using low energy electron microscopy, we have investigated the (2×1)-(1×1) phase transition occurring above 925 K on Ge(001). Dimer breakup has been identified as the physical origin of this transition. A quantitative description of the dimer concentration during the transition involves configuration entropy of random monomers within the dimer matrix. The dimer formation energy amounts to 1.2±0.3  eV. Dimer breakup promotes reversible surface disorder by step proliferation and irreversible surface roughening above 1130 K.

KW - IR-61189

KW - METIS-214533

UR - http://www.scopus.com/inward/record.url?scp=0142120735&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.91.116102

DO - 10.1103/PhysRevLett.91.116102

M3 - Article

VL - 91

SP - 116102-1-116102-4

JO - Physical review letters

JF - Physical review letters

SN - 0031-9007

IS - 11

ER -