Chiral Phonons and Giant Magneto-Optical Effect in CrBr3 2D Magnet

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F21%3A43922162" target="_blank" >RIV/60461373:22310/21:43922162 - isvavai.cz</a>

Result on the web

<a href="https://onlinelibrary.wiley.com/doi/full/10.1002/adma.202101618" target="_blank" >https://onlinelibrary.wiley.com/doi/full/10.1002/adma.202101618</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/adma.202101618" target="_blank" >10.1002/adma.202101618</a>

Result language

angličtina

Original language name

Chiral Phonons and Giant Magneto-Optical Effect in CrBr3 2D Magnet

Original language description

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 E-g phonons, and the phonon eigenmodes exhibit clockwise and counterclockwise rotational vibrations corresponding to angular momenta of l = +/- 1. Such E-g chiral phonons completely switch the polarization of incident circularly polarized light. On the other hand, the non-degenerate non-chiral A(g) 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 E-g 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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

<a href="/en/project/LTAUSA19034" target="_blank" >LTAUSA19034: Two-Dimensional Nanomaterials for Application in Electronic</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Advanced Materials

ISSN

0935-9648

e-ISSN

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Volume of the periodical

33

Issue of the periodical within the volume

36

Country of publishing house

DE - GERMANY

Number of pages

8

Pages from-to

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UT code for WoS article

000677213000001

EID of the result in the Scopus database

2-s2.0-85111093765