Phonon-assisted luminescence of polar semiconductors: Fröhlich coupling versus deformation-potential scattering

A. Chernikov, V. Bornwasser, M. Koch, S. Chatterjee, C. N. Böttge, T. Feldtmann, M. Kira, S. W. Koch, T. Wassner, S. Lautenschläger, B. K. Meyer, M. Eickhoff

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


The origin of exciton-phonon interaction in polar semiconductors is investigated. The relative contributions of Fröhlich 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. Fröhlich 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 Fröhlich interaction prevails in CdS, and both coupling mechanisms yield almost equal contributions in ZnS.

Original languageEnglish (US)
Article number035201
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number3
StatePublished - Jan 4 2012

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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