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    Pressure-induced resonance broadening of exciton line shapes in semiconductors: Direct determination of intervalley scattering rates in GaAs

    Satpathy, Sashi Sekhar, 1956-
    Chandrasekhar, Meera
    Chandrasekhar, Holalkere R.
    Venkateswaran, Uma Devi
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    [PDF] PressureInducedResonanceBroadening.pdf (948.3Kb)
    Date
    1991
    Format
    Article
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    Abstract
    We show that the exciton photoluminescence line shape in the GaAs/AlxGa1-xAs quantum wells under pressure is broadened by hybridization of the Γ exciton with the X and the L continua via electron-phonon coupling. Furthermore, we demonstrate the pressure tuning of the resonance-broadening effect which can be used to extract the electron-phonon coupling parameters directly. For GaAs we estimate the intervalley electron-phonon deformation potential DΓX to be 10.7±0.7 eV/Å. The resonance effect should be observable in other semiconductors as well.
    URI
    http://hdl.handle.net/10355/8166
    Citation
    Phys. Rev. B 44, 11339-11344 (1991)
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    • Physics and Astronomy publications (MU)

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