Atomic structure of self-organizing iridium induced nanowires on Ge(001)

Nikolai Kabanov, Rene Heimbuch, Henricus J.W. Zandvliet, A.M. Saletsky, A.L. Klavsyuk

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)

Abstract

The atomic structure of self-organizing iridium (Ir) induced nanowires on Ge(001) is studied by density functional theory (DFT) calculations and variable-temperature scanning tunneling microscopy. The Ir induced nanowires are aligned in a direction perpendicular to the Ge(001) substrate dimer rows, have a width of two atoms and are completely kink-less. Density functional theory calculations show that the Ir atoms prefer to dive into the Ge(001) substrate and push up the neighboring Ge substrate atoms. The nanowires are composed of Ge atoms and not Ir atoms as previously assumed. The regions in the vicinity of the nanowires are very dynamic, even at temperatures as low as 77 K. Time-resolved scanning tunneling microscopy measurements reveal that this dynamics is caused by buckled Ge substrate dimers that flip back and forth between their two buckled configurations.
Original languageEnglish
Pages (from-to)12-17
JournalApplied surface science
Volume404
DOIs
Publication statusPublished - 2017

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Iridium
Nanowires
Atoms
Scanning tunneling microscopy
Substrates
Dimers
Density functional theory
Temperature

Keywords

  • METIS-322058
  • IR-104628

Cite this

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title = "Atomic structure of self-organizing iridium induced nanowires on Ge(001)",
abstract = "The atomic structure of self-organizing iridium (Ir) induced nanowires on Ge(001) is studied by density functional theory (DFT) calculations and variable-temperature scanning tunneling microscopy. The Ir induced nanowires are aligned in a direction perpendicular to the Ge(001) substrate dimer rows, have a width of two atoms and are completely kink-less. Density functional theory calculations show that the Ir atoms prefer to dive into the Ge(001) substrate and push up the neighboring Ge substrate atoms. The nanowires are composed of Ge atoms and not Ir atoms as previously assumed. The regions in the vicinity of the nanowires are very dynamic, even at temperatures as low as 77 K. Time-resolved scanning tunneling microscopy measurements reveal that this dynamics is caused by buckled Ge substrate dimers that flip back and forth between their two buckled configurations.",
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Atomic structure of self-organizing iridium induced nanowires on Ge(001). / Kabanov, Nikolai; Heimbuch, Rene; Zandvliet, Henricus J.W.; Saletsky, A.M.; Klavsyuk, A.L.

In: Applied surface science, Vol. 404, 2017, p. 12-17.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Atomic structure of self-organizing iridium induced nanowires on Ge(001)

AU - Kabanov, Nikolai

AU - Heimbuch, Rene

AU - Zandvliet, Henricus J.W.

AU - Saletsky, A.M.

AU - Klavsyuk, A.L.

PY - 2017

Y1 - 2017

N2 - The atomic structure of self-organizing iridium (Ir) induced nanowires on Ge(001) is studied by density functional theory (DFT) calculations and variable-temperature scanning tunneling microscopy. The Ir induced nanowires are aligned in a direction perpendicular to the Ge(001) substrate dimer rows, have a width of two atoms and are completely kink-less. Density functional theory calculations show that the Ir atoms prefer to dive into the Ge(001) substrate and push up the neighboring Ge substrate atoms. The nanowires are composed of Ge atoms and not Ir atoms as previously assumed. The regions in the vicinity of the nanowires are very dynamic, even at temperatures as low as 77 K. Time-resolved scanning tunneling microscopy measurements reveal that this dynamics is caused by buckled Ge substrate dimers that flip back and forth between their two buckled configurations.

AB - The atomic structure of self-organizing iridium (Ir) induced nanowires on Ge(001) is studied by density functional theory (DFT) calculations and variable-temperature scanning tunneling microscopy. The Ir induced nanowires are aligned in a direction perpendicular to the Ge(001) substrate dimer rows, have a width of two atoms and are completely kink-less. Density functional theory calculations show that the Ir atoms prefer to dive into the Ge(001) substrate and push up the neighboring Ge substrate atoms. The nanowires are composed of Ge atoms and not Ir atoms as previously assumed. The regions in the vicinity of the nanowires are very dynamic, even at temperatures as low as 77 K. Time-resolved scanning tunneling microscopy measurements reveal that this dynamics is caused by buckled Ge substrate dimers that flip back and forth between their two buckled configurations.

KW - METIS-322058

KW - IR-104628

U2 - 10.1016/j.apsusc.2017.01.206

DO - 10.1016/j.apsusc.2017.01.206

M3 - Article

VL - 404

SP - 12

EP - 17

JO - Applied surface science

JF - Applied surface science

SN - 0169-4332

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