Polarized Raman spectroscopy on topological semimetal Co3Sn2S2
Kenya Tanaka, Taishi Nishihara, Akira Takakura, Yasutomo Segawa, Kazunari Matsuda, Yuhei Miyauchi*
J. Raman Spectrosc. 2022, DOI: 10.1002/jrs.6459
We present polarized Raman spectroscopy of the topological semimetal Co3Sn2S2. Two major phonon Raman peaks were observed at 289 cm-1 and 386 cm-1 over continuous background emission signals, and attributed to Γ point phonon modes with Eg and A1g symmetries, respectively, according to the group theory and Raman tensor analysis. Line shape analyses revealed that the high- frequency A1g mode exhibited asymmetric peak feature suggesting the Fano resonance between the A1g phonon scattering with the continuous electronic background.