Study of the near band-edge excitonic transition energies of the mixed layered compounds of Mo1-xWx Se2 single crystals

1st Nommensen International Conference on Technology and Engineering

Sigiro, Mula^1

Department of Physics Education, Faculty of Teacher Training and Education, Universitas HKBP Nommensen, Medan

20234, Indonesia^1

关键词: Excitonic transition;    Layered compound;    Line shape;    Near band edge;    Piezoreflectance;    Spectral feature;    Temperature dependence;    Temperature range;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/237/1/012048/pdf
DOI  :  10.1088/1757-899X/237/1/012048

来源: IOP

【 摘 要 】

The temperature dependence of the spectral features in the vicinity of the direct band edge of Mo1-xWxSe2single crystals was measured in the temperature range of 25-300 K using piezoreflectance (PzR). The near band-edge excitonic transition energies of the mixed layered compounds of Mo1-xWxSe2single crystals determined accurately from a detailed line-shape fit of the PzR spectra. From a detailed line-shape fit of the PzR spectra, the temperature dependence of the energies of the band-edge excitons are determined accurately.