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Anisotropic strain ...
Anisotropic strain and phonon deformation potentials in GaN
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- Darakchieva, Vanya, 1971- (author)
- Linköpings universitet,Halvledarmaterial,Tekniska högskolan
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- Paskova, Tanja, 1961- (author)
- Linköpings universitet,Tekniska högskolan,Institutionen för fysik, kemi och biologi
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Schubert, M. (author)
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- Arwin, Hans, 1950- (author)
- Linköpings universitet,Tekniska högskolan,Tillämpad optik
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- Paskov, Plamen, 1959- (author)
- Linköpings universitet,Halvledarmaterial,Tekniska högskolan
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- Monemar, Bo, 1942- (author)
- Linköpings universitet,Halvledarmaterial,Tekniska högskolan
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Hommel, D. (author)
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Off, J. (author)
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Scholz, F. (author)
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Heuken, M. (author)
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Haskell, B.A. (author)
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Fini, P.T. (author)
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Speck, S.J. (author)
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Nakamura, S. (author)
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(creator_code:org_t)
- 2007
- 2007
- English.
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In: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 75:19, s. 195217-
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- We report optical phonon frequency studies in anisotropically strained c -plane- and a -plane-oriented GaN films by generalized infrared spectroscopic ellipsometry and Raman scattering spectroscopy. The anisotropic strain in the films is obtained from high-resolution x-ray diffraction measurements. Experimental evidence for splitting of the GaN E1 (TO), E1 (LO), and E2 phonons under anisotropic strain in the basal plane is presented, and their phonon deformation potentials c E1 (TO), c E1 (LO), and c E2 are determined. A distinct correlation between anisotropic strain and the A1 (TO) and E1 (LO) frequencies of a -plane GaN films reveals the a A1 (TO), b A1 (TO), a E1 (LO), and b E1 (LO) phonon deformation potentials. The a A1 (TO) and b A1 (TO) are found to be in very good agreement with previous results from Raman experiments. Our a A1 (TO) and a E1 (LO) phonon deformation potentials agree well with recently reported theoretical estimations, while b A1 (TO) and b E1 (LO) are found to be significantly larger than the theoretical values. A discussion of the observed differences is presented. © 2007 The American Physical Society.
Keyword
- NATURAL SCIENCES
- NATURVETENSKAP
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- ref (subject category)
- art (subject category)
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Darakchieva, Van ...
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Paskova, Tanja, ...
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Schubert, M.
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Arwin, Hans, 195 ...
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Paskov, Plamen, ...
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Monemar, Bo, 194 ...
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show more...
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Hommel, D.
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Off, J.
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Scholz, F.
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Heuken, M.
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Haskell, B.A.
-
Fini, P.T.
-
Speck, S.J.
-
Nakamura, S.
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show less...
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Physical Review ...
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Linköping University