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- W2078756413 abstract "We have measured the three independent components of the two-phonon Raman tensor of Si and GaP at room temperature. The component of Γ1 symmetry is the strongest, while the Γ12 component is practically negligible. The Γ1 components are due mainly to overtone bands; the Γ15 component observed in GaP seems due to combinations of the TO and LO branches: the Γ2 spectrum of Si is essentially a replica of the density of states of the transverse optical phonons. The results are compared with neutron scattering data. Es wurden die drei unabhängigen Komponenten des Zwei-Phononen- Ramanspektrums von Ge und GaP gemessen. Es wird gezeigt, daβ die Komponente der Γ-Symmetrie die stärkste ist; die Komponente der Γ12-Symmetrie ist dagegen vernachlässigbar. Die Γ1-Komponenten entstehen durch Oberschwingungen, die die Γ15-Komponente des GaP durch Kombination der TO und LO Phononenbänder. Das Γ1-Spektrum des Si stellt ein Bild der Zustandsdichte der TO-Phononen dar. Die Ergebnisse werden mit Neutronenstreuungsmessungen verglichen." @default.
- W2078756413 created "2016-06-24" @default.
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- W2078756413 date "1972-05-01" @default.
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- W2078756413 title "Two-phonon Raman spectra of Si and GaP" @default.
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- W2078756413 doi "https://doi.org/10.1016/0038-1098(72)90231-1" @default.
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