Effects of lower symmetry and dimensionality on Raman spectra in two-dimensional WSe2

• Main Authors: Luo, Xin, Zhao, Yanyuan, Zhang, Jun, Toh, Minglin, Xiong, Qihua, Quek, Su Ying, Kloc, Christian
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2014
• Subjects: DRNTU::Science::Physics
• Online Access: https://hdl.handle.net/10356/101719; http://hdl.handle.net/10220/18728
• Institution: Nanyang Technological University

We report the observation and interpretation of new Raman peaks in few-layer tungsten diselenide (WSe2), induced by the reduction of symmetry going from three-dimensional (3D) to two-dimensional (2D). In general, Raman frequencies in 2D materials follow quite closely the frequencies of corresponding...