Chiral phonons in sixfold chiral CrSi 2 : Raman spectroscopy and first-principles calculations
Abstract
Chiral phonons have been identified in several chiral crystals, primarily in those with trigonal symmetry and threefold screw axes. In this study, chiral phonons in CrSi$_2$, a chiral crystal with a sixfold helical structure, were investigated. Circularly polarized Raman spectroscopy revealed a subtle splitting of doubly degenerate $E_2$ phonon modes between cross-circular polarization configurations. These observations, supported by first-principles phonon calculations, indicate the presence of chiral phonons in CrSi$_2$, expanding the scope of materials that exhibit chiral vibrational modes beyond the conventional trigonal class.
Fields of Study & Subjects
Topological Materials and Phenomena
Advanced Condensed Matter Physics
Crystal Structures and Properties
Publication details
- Journal / source
- Physical review. B./Physical review. B
- Volume
- 113
- Issue
- 10
- Publication date
- 17 February 2026
- Language
- EN