Observation of forbidden phonons, Fano resonance and dark excitons by resonance Raman scattering in few-layer WS2

• Published in: 2d materials Vol. 4; no. 3
• Main Authors: Tan, Qing-Hai, Sun, Yu-Jia, Liu, Xue-Lu, Zhao, Yanyuan, Xiong, Qihua, Tan, Ping-Heng, Zhang, Jun
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.09.2017
• Subjects: dark exciton; Davydov splitting; Fano resonance; resonant Raman scattering

The optical properties of the two-dimensional (2D) crystals are dominated by tightly bound electron-hole pairs (excitons) and lattice vibration modes (phonons). The exciton-phonon interaction is fundamentally important to understand the optical properties of 2D materials and thus helps to develop em...