Chiral phonons and giant magneto-optical effect in CrBr₃ 2D magnet

• Main Authors: Yin, Tingting, Ulman, Kanchan Ajit, Liu, Sheng, Granados Del Águila, Andrés, Huang, Yuqing, Zhang, Lifa, Serra, Marco, Sedmidubsky, David, Sofer, Zdenek, Quek, Su Ying, Xiong, Qihua
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2021
• Subjects: Science::Physics; Chiral Phonons; Pseudoangular Momentum
• Online Access: https://hdl.handle.net/10356/152378
• Institution: Nanyang Technological University

Phonons with chirality determine the optical helicity of inelastic light scattering processes due to their nonzero angular momentum. Here it is shown that 2D magnetic CrBr3 hosts chiral phonons at the Brillouin-zone center. These chiral phonons are linear combinations of the doubly-degenerate Eg pho...