Three-dimensional valley-contrasting sound
| Title: | Three-dimensional valley-contrasting sound |
|---|---|
| Authors: | Xue, Haoran, Ge, Yong, Cheng, Zheyu, Guan, Yi-jun, Zhu, Jiaojiao, Zou, Hong-yu, Yuan, Shou-qi, Yang, Shengyuan A., Sun, Hong-xiang, Chong, Yidong, Zhang, Baile |
| Source: | Sci. Adv. 10, eadp0377 (2024) |
| Publication Year: | 2024 |
| Collection: | Condensed Matter |
| Subject Terms: | Condensed Matter - Mesoscale and Nanoscale Physics |
| More Details: | Spin and valley are two fundamental properties of electrons in crystals. The similarity between them is well understood in valley-contrasting physics established decades ago in two-dimensional (2D) materials like graphene--with broken inversion symmetry, the two valleys in graphene exhibit opposite orbital magnetic moments, similar to the spin-1/2 behaviors of electrons, and opposite Berry curvature that leads to a half topological charge. However, valley-contrasting physics has never been explored in 3D crystals. Here, we develop a 3D acoustic crystal exhibiting 3D valley-contrasting physics. Unlike spin that is fundamentally binary, valley in 3D can take six different values, each carrying a vortex in a distinct direction. The topological valley transport is generalized from the edge states of 2D materials to the surface states of 3D materials, with interesting features including robust propagation, topological refraction, and valley-cavity localization. Our results open a new route for wave manipulation in 3D space. Comment: 8 pages, 5 figures |
| Document Type: | Working Paper |
| DOI: | 10.1126/sciadv.adp0377 |
| Access URL: | http://arxiv.org/abs/2409.11714 |
| Accession Number: | edsarx.2409.11714 |
| Database: | arXiv |
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| Items | – Name: Title Label: Title Group: Ti Data: Three-dimensional valley-contrasting sound – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Xue%2C+Haoran%22">Xue, Haoran</searchLink><br /><searchLink fieldCode="AR" term="%22Ge%2C+Yong%22">Ge, Yong</searchLink><br /><searchLink fieldCode="AR" term="%22Cheng%2C+Zheyu%22">Cheng, Zheyu</searchLink><br /><searchLink fieldCode="AR" term="%22Guan%2C+Yi-jun%22">Guan, Yi-jun</searchLink><br /><searchLink fieldCode="AR" term="%22Zhu%2C+Jiaojiao%22">Zhu, Jiaojiao</searchLink><br /><searchLink fieldCode="AR" term="%22Zou%2C+Hong-yu%22">Zou, Hong-yu</searchLink><br /><searchLink fieldCode="AR" term="%22Yuan%2C+Shou-qi%22">Yuan, Shou-qi</searchLink><br /><searchLink fieldCode="AR" term="%22Yang%2C+Shengyuan+A%2E%22">Yang, Shengyuan A.</searchLink><br /><searchLink fieldCode="AR" term="%22Sun%2C+Hong-xiang%22">Sun, Hong-xiang</searchLink><br /><searchLink fieldCode="AR" term="%22Chong%2C+Yidong%22">Chong, Yidong</searchLink><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Baile%22">Zhang, Baile</searchLink> – Name: TitleSource Label: Source Group: Src Data: Sci. Adv. 10, eadp0377 (2024) – Name: DatePubCY Label: Publication Year Group: Date Data: 2024 – Name: Subset Label: Collection Group: HoldingsInfo Data: Condensed Matter – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Condensed+Matter+-+Mesoscale+and+Nanoscale+Physics%22">Condensed Matter - Mesoscale and Nanoscale Physics</searchLink> – Name: Abstract Label: Description Group: Ab Data: Spin and valley are two fundamental properties of electrons in crystals. The similarity between them is well understood in valley-contrasting physics established decades ago in two-dimensional (2D) materials like graphene--with broken inversion symmetry, the two valleys in graphene exhibit opposite orbital magnetic moments, similar to the spin-1/2 behaviors of electrons, and opposite Berry curvature that leads to a half topological charge. However, valley-contrasting physics has never been explored in 3D crystals. Here, we develop a 3D acoustic crystal exhibiting 3D valley-contrasting physics. Unlike spin that is fundamentally binary, valley in 3D can take six different values, each carrying a vortex in a distinct direction. The topological valley transport is generalized from the edge states of 2D materials to the surface states of 3D materials, with interesting features including robust propagation, topological refraction, and valley-cavity localization. Our results open a new route for wave manipulation in 3D space.<br />Comment: 8 pages, 5 figures – Name: TypeDocument Label: Document Type Group: TypDoc Data: Working Paper – Name: DOI Label: DOI Group: ID Data: 10.1126/sciadv.adp0377 – Name: URL Label: Access URL Group: URL Data: <link linkTarget="URL" linkTerm="http://arxiv.org/abs/2409.11714" linkWindow="_blank">http://arxiv.org/abs/2409.11714</link> – Name: AN Label: Accession Number Group: ID Data: edsarx.2409.11714 |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1126/sciadv.adp0377 Subjects: – SubjectFull: Condensed Matter - Mesoscale and Nanoscale Physics Type: general Titles: – TitleFull: Three-dimensional valley-contrasting sound Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Xue, Haoran – PersonEntity: Name: NameFull: Ge, Yong – PersonEntity: Name: NameFull: Cheng, Zheyu – PersonEntity: Name: NameFull: Guan, Yi-jun – PersonEntity: Name: NameFull: Zhu, Jiaojiao – PersonEntity: Name: NameFull: Zou, Hong-yu – PersonEntity: Name: NameFull: Yuan, Shou-qi – PersonEntity: Name: NameFull: Yang, Shengyuan A. – PersonEntity: Name: NameFull: Sun, Hong-xiang – PersonEntity: Name: NameFull: Chong, Yidong – PersonEntity: Name: NameFull: Zhang, Baile IsPartOfRelationships: – BibEntity: Dates: – D: 18 M: 09 Type: published Y: 2024 |
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