Strain-induced direct-indirect bandgap transition and phonon modulation in monolayer WS2

• Published in: Nano research Vol. 8; no. 8; pp. 2562 - 2572
• Main Authors: Wang, Yanlong, Cong, Chunxiao, Yang, Weihuang, Shang, Jingzhi, Peimyoo, Namphung, Chen, Yu, Kang, Junyong, Wang, Jianpu, Huang, Wei, Yu, Ting
• Format: Journal Article
• Language: English
• Published: Beijing Tsinghua University Press 01.08.2015
• Subjects: Atomic/Molecular Structure and Spectra; Biomedicine; Biotechnology; Chemistry and Materials Science; Condensed Matter Physics; Materials Science; Nanotechnology; Research Article; WS2; 偏振拉曼光谱; 光调制; 单层; 应变诱导; 电子能带结构; 直接带隙; 间接跃迁; strain; trion; indirect transition; crystallographic orientation; monolayer WS; light-emission tuning

In situ strain photoluminescence （PL） and Raman spectroscopy have been employed to exploit the evolutions of the electronic band structure and lattice vibrational responses of chemical vapor deposition （CVD）-grown monolayer tungsten disulphide （WS2） under uniaxial tensile strain. Observable broadeni...