期刊
PHYSICAL REVIEW B
卷 85, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.035201
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资金
- German Science Foundation (DFG) and the German Ministry for Education and Research (BMBF)
- International Research Training Group 790 Electron-Electron Interactions in Solids (Marburg-Budapest)
The origin of exciton-phonon interaction in polar semiconductors is investigated. The relative contributions of Frohlich coupling and deformation potential scattering are identified by analyzing experimentally measured phonon-assisted luminescence using a rigorous many-body approach. Our experiment-theory comparison demonstrates that phonon scattering is significantly influenced by many-body interactions. Frohlich interaction can be strongly suppressed for excitons even when it dominates electronic single particle scattering. The results show that deformation potential scattering dominates the exciton-phonon interaction in ZnO, whereas Frohlich interaction prevails in CdS, and both coupling mechanisms yield almost equal contributions in ZnS.
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