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Classification of Ge hut clusters in arrays formed by molecular beam epitaxy at low temperatures on the Si(001) surface

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Prokhorov General Physics Institute of the Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, Russian Federation

Ge hut clusters forming quantum dot arrays on the Si(001) surface in the process of low-temperature ultrahigh-vacuum molecular beam epitaxy are morphologicaly investigated and classified using in situ scanning tunnelling microscopy. It is found that two main Ge hut cluster types — pyramidal and wedge-shaped — have different atomic structures, and it is concluded that shape transitions between the two are impossible. Derivative cluster species — obelisks (or truncated wedges) and accreted wedges — are revealed and investigated for the first time and shown to start dominating at high Ge coverages. The uniformity of cluster arrays is shown to be controlled by the scatter in the length of wedge-like clusters. At low growth temperatures (360 °C), cluster nucleation during the growth of the array is observed for all values of Ge coverage except for a particular point at which the arrays are more uniform than at higher or lower coverages. At higher temperatures (530 °C), no cluster nucleation is observed after the initial formation of the array.

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Fulltext is also available at DOI: 10.3367/UFNe.0180.201003e.0289
PACS: 68.37.Ef, 81.07.Ta, 81.15.Hi (all)
DOI: 10.3367/UFNe.0180.201003e.0289
URL: https://ufn.ru/en/articles/2010/3/d/
000280435100004
2-s2.0-77954773542
2010PhyU...53..279A
Citation: Arapkina L V, Yuryev V A "Classification of Ge hut clusters in arrays formed by molecular beam epitaxy at low temperatures on the Si(001) surface" Phys. Usp. 53 279–290 (2010)
BibTexBibNote ® (generic)BibNote ® (RIS) MedlineRefWorks
PT Journal Article
TI Classification of Ge hut clusters in arrays formed by molecular beam epitaxy at low temperatures on the Si(001) surface
AU Arapkina L V
FAU Arapkina LV
AU Yuryev V A
FAU Yuryev VA
DP 10 Mar, 2010
TA Phys. Usp.
VI 53
IP 3
PG 279-290
RX 10.3367/UFNe.0180.201003e.0289
URL https://ufn.ru/en/articles/2010/3/d/
SO Phys. Usp. 2010 Mar 10;53(3):279-290

Оригинал: Арапкина Л В, Юрьев В А «Классификация hut-кластеров Ge в массивах, формируемых на поверхности Si(001) методом молекулярно-лучевой эпитаксии при низких температурах» УФН 180 289–302 (2010); DOI: 10.3367/UFNr.0180.201003e.0289

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