Chiral phonons
Juraschek DM, Geilhufe RM, Zhu H, Basini M, Baum P, Baydin A, Chaudhary S, Fechner M, Flebus B, Grissonnanche G, Kirilyuk AI, Lemeshko M, Maehrlein SF, Mignolet M, Murakami S, Niu Q, Nowak U, Romao CP, Rostami H, Satoh T, Spaldin NA, Ueda H, Zhang L. 2025. Chiral phonons. Nature Physics.
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Journal Article
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Author
Juraschek, Dominik M.;
Geilhufe, R. Matthias;
Zhu, Hanyu;
Basini, Martina;
Baum, Peter;
Baydin, Andrey;
Chaudhary, Swati;
Fechner, Michael;
Flebus, Benedetta;
Grissonnanche, Gael;
Kirilyuk, Andrei I.;
Lemeshko, MikhailISTA 
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All
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Abstract
A rapidly increasing body of work reporting phenomena associated with lattice vibrations carrying angular momentum has led to the emergence of the field of chiral phonons. Some of these properties, such as the phonon magnetic moment, also occur in achiral phonons that are circularly or elliptically polarized, while the presence of chirality has additional implications for the types of interaction allowed between the phonons and light, electrons and other quasiparticles. In this Perspective we introduce a framework for classifying phonons with angular momentum, and provide illustrations of the different types using examples from the recent literature. Specifically, we suggest the term ‘axial phonon’ to encompass all phonons that carry angular momentum, real or pseudo, and reserve the term ‘chiral phonon’ for those phonons that break improper rotational symmetry. We hope that this scheme provides clarification on the matter of phonon chirality and will serve as a guide for future research.
Publishing Year
Date Published
2025-09-22
Journal Title
Nature Physics
Publisher
Springer Nature
Acknowledgement
We thank A. V. Balatsky, E. Bousquet, A. Disa, S. Kamba, L. Klebl, R. Merlin, A. Srivastava, A. Stroppa, M. Udina, P. Wong and D. Xiao for valuable discussions. M.B. acknowledges support from SNSF Ambizione project number PZ00P2_216089. P.B. and U.N. acknowledge funding from the Deutsche Forschungsgemeinschaft (grant number 541503763). B.F. acknowledges support from the National Science Foundation under grant number NSF DMR-2144086. G.G. acknowledges support from STeP2 number ANR-22-EXES-0013, QuantExt number ANR-23-CE30-0001-01, Audace CEA number ANR-24-RRII-0004 and the École Polytechnique foundation. A.I.K. acknowledges the Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO-I) for their financial contribution, including the support of the HFML-FELIX Laboratory. D.M.J. acknowledges support from Tel Aviv University and ERC Starting Grant CHIRALPHONONICS grant number 101166037. S.F.M. acknowledges funding from the Deutsche Forschungsgemeinschaft (grant number 469405347). C.P.R. and N.A.S. were supported by ETH Zurich and by the European Union and Horizon 2020, grant agreement numbers 810451 and 101030352. R.M.G. acknowledges support from the Swedish Research Council (VR starting grant number 2022-03350), the Olle Engkvist Foundation (grant number 229-0443), the Royal Physiographic Society in Lund (Horisont), the Knut and Alice Wallenberg Foundation (grant number 2023.0087) and Chalmers University of Technology via the Department of Physics and the Areas of Advance Nano and Materials Science. Q.N. is supported by the National Natural Science Foundation of China (grant number 12234017) and the National Key Research and Development Program of China (grant number 2023YFA1406300). H.R. acknowledges funding from the Engineering and Physical Sciences Research Council (grant number UKRI122) and Royal Society (grant number IES\R2\242309). T.S. acknowledges support from MEXT X-NICS (grant number JPJ011438), NINS OML Project (grant number OML012301) and JST CREST (grant number JPMJCR24R5). H.Z. acknowledges support from the Welch Foundation (grant number C-2128) and the National Science Foundation (grant number DMR-2240106). We acknowledge support from the Centre Européen de Calcul Atomique et Moléculaire (CECAM) in connection to organizing the workshop "Chiral Phonons in Quantum Materials", held in 2023, where the idea for this paper emerged.
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Cite this
Juraschek DM, Geilhufe RM, Zhu H, et al. Chiral phonons. Nature Physics. 2025. doi:10.1038/s41567-025-03001-9
Juraschek, D. M., Geilhufe, R. M., Zhu, H., Basini, M., Baum, P., Baydin, A., … Zhang, L. (2025). Chiral phonons. Nature Physics. Springer Nature. https://doi.org/10.1038/s41567-025-03001-9
Juraschek, Dominik M., R. Matthias Geilhufe, Hanyu Zhu, Martina Basini, Peter Baum, Andrey Baydin, Swati Chaudhary, et al. “Chiral Phonons.” Nature Physics. Springer Nature, 2025. https://doi.org/10.1038/s41567-025-03001-9.
D. M. Juraschek et al., “Chiral phonons,” Nature Physics. Springer Nature, 2025.
Juraschek DM, Geilhufe RM, Zhu H, Basini M, Baum P, Baydin A, Chaudhary S, Fechner M, Flebus B, Grissonnanche G, Kirilyuk AI, Lemeshko M, Maehrlein SF, Mignolet M, Murakami S, Niu Q, Nowak U, Romao CP, Rostami H, Satoh T, Spaldin NA, Ueda H, Zhang L. 2025. Chiral phonons. Nature Physics.
Juraschek, Dominik M., et al. “Chiral Phonons.” Nature Physics, Springer Nature, 2025, doi:10.1038/s41567-025-03001-9.
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