Two- and three-dimensional models for analysis of optical absorption in tungsten disulphide single crystals

Bulletin of materials science

G K Solanki¹  S G Patel¹  Dhairya A Dholakia¹  M K Agarwal¹ 

[1] Department of Physics, Sardar Patel University, Vallabh Vidyanagar 388 120, India$$Department of Physics, Sardar Patel University, Vallabh Vidyanagar 388 120, IndiaDepartment of Physics, Sardar Patel University, Vallabh Vidyanagar 388 120, India$$

关键词: Optical band gap;    two- and three-dimensional;    optical absorption.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The optical energy gaps of WS₂ single crystal were determined from the analysis of the absorption spectrum near the fundamental absorption edge at room temperature using light parallel to ð‘�?-axis incident normally on the basal plane. On the basis of two- and three-dimensional models it was found that both direct and indirect band transitions took place in WS₂ and the indirect transition was of the allowed type. The optical energy gaps corresponding to both transitions were determined and the phonon energies associated with the indirect transitions estimated. The implications of the results have been discussed.

【 授权许可】

Unknown