Valence band physics in wurtzite GaN

T. Azuhata, Takayuki Sota, S. Chichibu, A. Kuramata, K. Horino, M. Yamaguchi, T. Yagi, S. Nakamura

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Citations (Scopus)

    Abstract

    We present a summary of recent progress towards the understanding of the valence-band physics in wurtzite GaN. Systematic studies have been performed on the strain dependence of the free exciton resonance energies by photoreflectance measurements using well-characterized samples. Analyzing the experimental data with the Hamiltonian appropriate for the valence bands, the values have been determined of the crystal field splitting, the spin-orbit splitting, the shear deformation potential constants, and the energy gap in the unstrained crystal. Discussions are given on the strain dependence of the energy gaps, of the effective masses, and of the binding energies for the free exciton ground states as well as on the valence band parameters. Using the obtained values and the generalized Elliott formula, the fundamental optical absorption spectra obtained experimentally were analyzed. The values of the elastic stiffness constants, which play a crucial role to determine the shear deformation potential constants, are also given.

    Original languageEnglish
    Title of host publicationMaterials Research Society Symposium - Proceedings
    EditorsC.R. Abernathy, H. Amano, J.C. Zolper
    PublisherMaterials Research Society
    Pages445-456
    Number of pages12
    Volume468
    Publication statusPublished - 1997
    EventProceedings of the 1997 MRS Spring Symposium - San Francisco, CA, USA
    Duration: 1997 Apr 11997 Apr 4

    Other

    OtherProceedings of the 1997 MRS Spring Symposium
    CitySan Francisco, CA, USA
    Period97/4/197/4/4

    Fingerprint

    Valence bands
    Physics
    Excitons
    Shear deformation
    Energy gap
    Hamiltonians
    Crystals
    Binding energy
    Light absorption
    Ground state
    Absorption spectra
    Orbits
    Stiffness
    LDS 751

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials

    Cite this

    Azuhata, T., Sota, T., Chichibu, S., Kuramata, A., Horino, K., Yamaguchi, M., ... Nakamura, S. (1997). Valence band physics in wurtzite GaN. In C. R. Abernathy, H. Amano, & J. C. Zolper (Eds.), Materials Research Society Symposium - Proceedings (Vol. 468, pp. 445-456). Materials Research Society.

    Valence band physics in wurtzite GaN. / Azuhata, T.; Sota, Takayuki; Chichibu, S.; Kuramata, A.; Horino, K.; Yamaguchi, M.; Yagi, T.; Nakamura, S.

    Materials Research Society Symposium - Proceedings. ed. / C.R. Abernathy; H. Amano; J.C. Zolper. Vol. 468 Materials Research Society, 1997. p. 445-456.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Azuhata, T, Sota, T, Chichibu, S, Kuramata, A, Horino, K, Yamaguchi, M, Yagi, T & Nakamura, S 1997, Valence band physics in wurtzite GaN. in CR Abernathy, H Amano & JC Zolper (eds), Materials Research Society Symposium - Proceedings. vol. 468, Materials Research Society, pp. 445-456, Proceedings of the 1997 MRS Spring Symposium, San Francisco, CA, USA, 97/4/1.
    Azuhata T, Sota T, Chichibu S, Kuramata A, Horino K, Yamaguchi M et al. Valence band physics in wurtzite GaN. In Abernathy CR, Amano H, Zolper JC, editors, Materials Research Society Symposium - Proceedings. Vol. 468. Materials Research Society. 1997. p. 445-456
    Azuhata, T. ; Sota, Takayuki ; Chichibu, S. ; Kuramata, A. ; Horino, K. ; Yamaguchi, M. ; Yagi, T. ; Nakamura, S. / Valence band physics in wurtzite GaN. Materials Research Society Symposium - Proceedings. editor / C.R. Abernathy ; H. Amano ; J.C. Zolper. Vol. 468 Materials Research Society, 1997. pp. 445-456
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    abstract = "We present a summary of recent progress towards the understanding of the valence-band physics in wurtzite GaN. Systematic studies have been performed on the strain dependence of the free exciton resonance energies by photoreflectance measurements using well-characterized samples. Analyzing the experimental data with the Hamiltonian appropriate for the valence bands, the values have been determined of the crystal field splitting, the spin-orbit splitting, the shear deformation potential constants, and the energy gap in the unstrained crystal. Discussions are given on the strain dependence of the energy gaps, of the effective masses, and of the binding energies for the free exciton ground states as well as on the valence band parameters. Using the obtained values and the generalized Elliott formula, the fundamental optical absorption spectra obtained experimentally were analyzed. The values of the elastic stiffness constants, which play a crucial role to determine the shear deformation potential constants, are also given.",
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