Second order resonant Raman scattering at the E1 and E1 + Δ1 edges of germanium |
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Authors: | MA Renucci JB Renucci M Cardona |
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Institution: | Max-Planck-Institut für Festkörperforschung, Stuttgart, Federal Republic of Germany |
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Abstract: | The resonance of the 2TO phonon second order Raman band of germanium was investigated in the vicinity of the E1, E1 + Δ1 gaps. The peak reported earlier for 2TO phonons at Γ is interpreted as due to a resonant process of the iterative type, involving two first order electron-phonon vertices. The rest of the 2TO band is interpreted as a process involving a second order electron-two phonon interaction vertex. From these measurements three phonon coupling constants for the electron-two phonon interaction are obtained. |
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