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- W2394330510 abstract "A detailed Raman characterization of the structural properties of as-grown and annealed self-assembled Si/Ge dot multilayers is reported in this paper. Several new modes in as-grown or annealed Si/Ge dots and a frequency splitting of 4.2 cm~(-1) between LO and TO Ge-Ge modes in as-grown Si/Ge dots are observed in Raman spectra. An average Ge content of 0.8 and lateral strain of -3.4% are consistently obtained from these spectral features for as-grown Si/Ge dots with a lateral size of about 20 nm and a height of about 2 nm. It suggests that a certain amount of intermixing between Si spacer layers and Si/Ge dots takes place for the Si/Ge dot multilayers. The results show that the LO-TO frequency splitting of the Ge-Ge mode and the frequencies of the Ge-Ge and Ge-Si modes can be used as an efficient way to determine the average strain and composition in uncorrelated small-sized Si/Ge dot multilayers in which the mean strain field is close to the biaxial case." @default.
- W2394330510 created "2016-06-24" @default.
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- W2394330510 date "2004-01-01" @default.
- W2394330510 modified "2023-09-25" @default.
- W2394330510 title "Raman Characterization of Strain and Composition inSmall-sized Self-assembled Si/Ge Dots" @default.
- W2394330510 hasPublicationYear "2004" @default.
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