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Temperature dependant longitudinal optical phonon assisted emission of free exci

上传者: 2021-04-02 09:55:58上传 PDF文件 259.22KB 热度 4次
The Segall-Mahan theory is employed to calculate both one and two longitudinal-optical (LO) phonon sidebands of free excitons of zinc oxide (ZnO) in a wide temperature range. The energy spacing from the zero-phonon line to 1 LO and 2 LO phonon sidebands deviates gradually from their characteristic LO phonon energy with increaseing the temperature. The experimental results are good agreement with the theoretical calculation. Only one adjustable parameter is taken into account in this calculation,
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