Please use this identifier to cite or link to this item: https://doi.org/10.1002/adma.202101618
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dc.titleChiral Phonons and Giant Magneto-Optical Effect in CrBr3 2D Magnet
dc.contributor.authorYin, Tingting
dc.contributor.authorUlman, Kanchan Ajit
dc.contributor.authorLiu, Sheng
dc.contributor.authordel Aguila, Andres Granados
dc.contributor.authorHuang, Yuqing
dc.contributor.authorZhang, Lifa
dc.contributor.authorSerra, Marco
dc.contributor.authorSedmidubsky, David
dc.contributor.authorSofer, Zdenek
dc.contributor.authorQuek, Su Ying
dc.contributor.authorXiong, Qihua
dc.date.accessioned2022-08-05T07:52:53Z
dc.date.available2022-08-05T07:52:53Z
dc.date.issued2021-07-24
dc.identifier.citationYin, Tingting, Ulman, Kanchan Ajit, Liu, Sheng, del Aguila, Andres Granados, Huang, Yuqing, Zhang, Lifa, Serra, Marco, Sedmidubsky, David, Sofer, Zdenek, Quek, Su Ying, Xiong, Qihua (2021-07-24). Chiral Phonons and Giant Magneto-Optical Effect in CrBr3 2D Magnet. ADVANCED MATERIALS 33 (36). ScholarBank@NUS Repository. https://doi.org/10.1002/adma.202101618
dc.identifier.issn0935-9648
dc.identifier.issn1521-4095
dc.identifier.urihttps://scholarbank.nus.edu.sg/handle/10635/229977
dc.description.abstractPhonons 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 phonons, and the phonon eigenmodes exhibit clockwise and counterclockwise rotational vibrations corresponding to angular momenta of l = ± 1. Such Eg chiral phonons completely switch the polarization of incident circularly polarized light. On the other hand, the non-degenerate non-chiral Ag phonons display a giant magneto-optical effect under an external out-of-plane magnetic field, rotating the plane of polarization of the scattered linearly polarized light. The corresponding degree of polarization of the scattered light changes from 91% to −68% as the magnetic field strength increases from 0 to 5 T. In contrast, the chiral Eg modes display no field dependence. The results lay a foundation for the study of phonon chirality and magneto-optical phenomena in 2D magnetic materials, as well as their related applications, such as the phonon Hall effect, topological photonics, and Raman lasing.
dc.language.isoen
dc.publisherWILEY-V C H VERLAG GMBH
dc.sourceElements
dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectTechnology
dc.subjectChemistry, Multidisciplinary
dc.subjectChemistry, Physical
dc.subjectNanoscience & Nanotechnology
dc.subjectMaterials Science, Multidisciplinary
dc.subjectPhysics, Applied
dc.subjectPhysics, Condensed Matter
dc.subjectChemistry
dc.subjectScience & Technology - Other Topics
dc.subjectMaterials Science
dc.subjectPhysics
dc.subjectchiral phonons
dc.subjectpseudoangular momentum
dc.subjectmagneto-optical effect
dc.subjectCrBr
dc.subject(3) ferromagnet
dc.subjectspin-phonon coupling
dc.subjectRAMAN-SCATTERING
dc.subjectFERROMAGNETISM
dc.subjectSPECTRA
dc.subjectFIELD
dc.subjectMOS2
dc.typeArticle
dc.date.updated2022-08-02T04:07:28Z
dc.contributor.departmentCENTRE FOR ADVANCED 2D MATERIALS
dc.contributor.departmentDEPT OF PHYSICS
dc.contributor.departmentPHYSICS
dc.description.doi10.1002/adma.202101618
dc.description.sourcetitleADVANCED MATERIALS
dc.description.volume33
dc.description.issue36
dc.published.statePublished
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