Published in
Royal Society of Chemistry, Nanoscale, 21(13), p. 9686-9697, 2021
DOI: 10.1039/d1nr01355f
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Optical study of electron and acoustic phonon confinement in ultrathin-body germanium-on-insulator nanolayers
Journal article published in 2021 by
Vladimir Poborchii 
,
Jesse Groenen,
Pavel I. Geshev,
Junichi Hattori,
Wen Hsin Chang ,
Hiroyuki Ishii,
Toshifumi Irisawa,
Tatsuro Maeda
,
Jesse Groenen,
Pavel I. Geshev,
Junichi Hattori,
Wen Hsin Chang ,
Hiroyuki Ishii,
Toshifumi Irisawa,
Tatsuro Maeda
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Abstract
Ge-on-insulator (GeOI) acoustic phonon frequencies and E1 electron band gap vs. GeOI thickness (T) show agreement with confinement theories at T > 5 nm and disagree at T < 5 nm. Al2O3 coating improves agreement at T < 5 nm due to interface disorder reduction.