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Article: Observation of chiral phonons

TitleObservation of chiral phonons
Authors
Issue Date2018
PublisherAmerican Association for the Advancement of Science. The Journal's web site is located at http://sciencemag.org
Citation
Science, 2018, v. 359 n. 6375, p. 579-582 How to Cite?
AbstractChirality reveals symmetry breaking of the fundamental interaction of elementary particles. In condensed matter, for example, the chirality of electrons governs many unconventional transport phenomena such as the quantum Hall effect. Here we show that phonons can exhibit intrinsic chirality in monolayer tungsten diselenide. The broken inversion symmetry of the lattice lifts the degeneracy of clockwise and counterclockwise phonon modes at the corners of the Brillouin zone. We identified the phonons by the intervalley transfer of holes through hole-phonon interactions during the indirect infrared absorption, and we confirmed their chirality by the infrared circular dichroism arising from pseudoangular momentum conservation. The chiral phonons are important for electron-phonon coupling in solids, phonon-driven topological states, and energy-efficient information processing. © 2017 The Authors, some rights reserved.
Descriptioneid_2-s2.0-85041287701
Persistent Identifierhttp://hdl.handle.net/10722/257366
ISSN
2015 Impact Factor: 34.661
2015 SCImago Journal Rankings: 13.217

 

DC FieldValueLanguage
dc.contributor.authorZhu, H-
dc.contributor.authorYi, J-
dc.contributor.authorLi, MY-
dc.contributor.authorXiao, J-
dc.contributor.authorZhang, L-
dc.contributor.authorYang, CW-
dc.contributor.authorKaindl, RA-
dc.contributor.authorLi, LJ-
dc.contributor.authorWang, Y-
dc.contributor.authorZhang, X-
dc.date.accessioned2018-07-27T07:57:36Z-
dc.date.available2018-07-27T07:57:36Z-
dc.date.issued2018-
dc.identifier.citationScience, 2018, v. 359 n. 6375, p. 579-582-
dc.identifier.issn0036-8075-
dc.identifier.urihttp://hdl.handle.net/10722/257366-
dc.descriptioneid_2-s2.0-85041287701-
dc.description.abstractChirality reveals symmetry breaking of the fundamental interaction of elementary particles. In condensed matter, for example, the chirality of electrons governs many unconventional transport phenomena such as the quantum Hall effect. Here we show that phonons can exhibit intrinsic chirality in monolayer tungsten diselenide. The broken inversion symmetry of the lattice lifts the degeneracy of clockwise and counterclockwise phonon modes at the corners of the Brillouin zone. We identified the phonons by the intervalley transfer of holes through hole-phonon interactions during the indirect infrared absorption, and we confirmed their chirality by the infrared circular dichroism arising from pseudoangular momentum conservation. The chiral phonons are important for electron-phonon coupling in solids, phonon-driven topological states, and energy-efficient information processing. © 2017 The Authors, some rights reserved.-
dc.languageeng-
dc.publisherAmerican Association for the Advancement of Science. The Journal's web site is located at http://sciencemag.org-
dc.relation.ispartofScience-
dc.rightsScience. Copyright © American Association for the Advancement of Science.-
dc.rightsThis is the author’s version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in [Science Journal Title] on [Volume number and date], DOI: [insert DOI number].-
dc.titleObservation of chiral phonons-
dc.typeArticle-
dc.identifier.emailZhang, X: president@hku.hk-
dc.identifier.authorityZhang, X=rp02411-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1126/science.aar2711-
dc.identifier.hkuros700003492-
dc.identifier.volume359-
dc.identifier.issue6375-
dc.identifier.spage579-
dc.identifier.epage582-
dc.publisher.placeUnited States-

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