Open AccessМодификация структурно-морфологических свойств германия в многослойной нанопериодической структуре Al-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=-/Ge с промежуточными слоями Si при отжиге
Author(s) -
М. В. Байдакова,
Н. А. Берт,
V. Iu. Davydov,
А. В. Ершов,
A. A. Lëvin,
А. Н. Смирнов,
Л.А. Cокура,
O. M. Sreseli,
I. N. Iassievich
Publication year - 2021
Publication title -
fizika i tehnika poluprovodnikov
Language(s) - English
Resource type - Journals
eISSN - 1726-7315
pISSN - 0015-3222
DOI - 10.21883/ftp.2021.10.51438.37
Subject(s) - annealing (glass) , materials science , raman spectroscopy , crystallite , amorphous solid , transmission electron microscopy , atmospheric temperature range , crystallography , diffraction , nanotechnology , optics , composite material , chemistry , metallurgy , physics , meteorology
Multi-layered nanosized Al2O3/Ge/Si structures manufactured by electron-beam evaporation and annealed at a temperature within the range 700−900◦C are examined using transmission electron microscopy, Raman spectroscopy and X-ray diffraction techniques. The periodic structure with a good layer planarity is confirmed to retain after heat treatment up to 900◦C. At an annealing temperature above 700◦C, nanocrystallites with a bimodal size distribution start to form within initially amorphous Ge layers, the mean size of small crystallites being determined by Ge layer thickness and annealing temperature. An essential loss of Ge from multi-layered structure after 900oC anneal and development of Ge1−x Six solid solution with x up to 0.07 in the nanocrystallites is revealed.