Piezoreflectance study of Nb-doped MoS2 single crystals

1st Nommensen International Conference on Technology and Engineering

Sebayang, Kerista^1 ; Sigiro, Mula^2

Department of Physics, Faculty of Mathematics and Natural Sciences, University of Sumatera Utara, Medan

20155, Indonesia^1

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

20234, Indonesia^2

关键词: Broadening parameters;    Excitonic transition;    Line shape;    Most likely;    Piezoreflectance;    Spectral feature;    Temperature dependence;    Van der waals;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/237/1/012041/pdf
DOI  :  10.1088/1757-899X/237/1/012041

来源: IOP

【 摘 要 】

We have measured the temperature dependence of the spectral features in the vicinity of direct band-edge excitonic transition of the Nb-doped MoS2single crystals from 25 to 300 K using piezoreflectance (PzR). The energies and broadening parameters of the A and B excitons of the Nb-doped MoS2samples have been determined accurately via a detailed line shape fit of the PzR spectra. we can infer that the Nb ions are most likely intercalated between the van der Waals gap and stabilize the rhombohedral 3R phase of the MoS2crystal.