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Phonon Spectra of a-SiNx : H/Si Heterostructures Observed by Brillouin Light Scattering |
XIA Hua;ZHANG Wei;LI Zhifeng;QU Xuexuan;CHEN Kunji;ZHANG Xingkui |
State Key Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210008 |
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Cite this article: |
XIA Hua, ZHANG Wei, LI Zhifeng et al 1993 Chin. Phys. Lett. 10 627-629 |
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Abstract Low-frequency phonon spectra in a- SiNx : H/Si heterostructures have been observed by means of Brillouin light scattering. Measurement of the frequency shift on longitudinal and transverse acoustic phonons as well as on surface phonons enabled us to extract accurately two independent elastic moduli: c11 and c44 deduced from phase velocities of bulk acoustic modes and scattering wavevector, within effective medium approximation.
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Keywords:
78.35.+c
68.60.Bs
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Published: 01 October 1993
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PACS: |
78.35.+c
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(Brillouin and Rayleigh scattering; other light scattering)
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68.60.Bs
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(Mechanical and acoustical properties)
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