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Raman scattering of germanium nanocrystals embedded in glass matrix under hydrostatic pressure

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5 Author(s)
Liu, L. ; Department of Physics, Blk. S12, Faculty of Science, National University of Singapore, 2 Science Drive 3, Singapore 117542, Singapore ; Shen, Z.X. ; Teo, K.L. ; Kolobov, A.V.
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We have studied the hydrostatic pressure dependence of Ge nanocrystals embedded into SiO2 matrix on quartz-glass substrate by Raman scattering at room temperature. The pressure coefficient (dω/dP=0.77 cm-1kbar-1) obtained for the Ge–Ge mode in the nanocrystals is found to be almost twice as large compared with its corresponding bulk value (dω/dP=0.39 cm-1kbar-1). We explained our results using a simple elastic model, which describes the effective pressure transmitted from the matrix to the nanocrystals. © 2003 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:93 ,  Issue: 11 )

Date of Publication:

Jun 2003

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