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| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2410.20607 |
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| _version_ | 1866929562632323072 |
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| author | Hagiwara, Kenta Chen, Ying-Jiun Go, Dongwook Tan, Xin Liang Grytsiuk, Sergii Yang, Kui-Hon Ou Shu, Guo-Jiun Chien, Jing Shen, Yi-Hsin Huang, Xiang-Lin Chou, Fang-Cheng Cojocariu, Iulia Feyer, Vitaliy Lin, Minn-Tsong Blügel, Stefan Schneider, Claus Michael Mokrousov, Yuriy Tusche, Christian |
| author_facet | Hagiwara, Kenta Chen, Ying-Jiun Go, Dongwook Tan, Xin Liang Grytsiuk, Sergii Yang, Kui-Hon Ou Shu, Guo-Jiun Chien, Jing Shen, Yi-Hsin Huang, Xiang-Lin Chou, Fang-Cheng Cojocariu, Iulia Feyer, Vitaliy Lin, Minn-Tsong Blügel, Stefan Schneider, Claus Michael Mokrousov, Yuriy Tusche, Christian |
| contents | Chirality is ubiquitous in nature and manifests in a wide range of phenomena including chemical reactions, biological processes, and quantum transport of electrons. In quantum materials, the chirality of fermions, given by the relative directions between the electron spin and momentum, is connected to the band topology of electronic states. Here, we show that in structurally chiral materials like CoSi, the orbital angular momentum (OAM) serves as the main driver of a nontrivial band topology in this new class of unconventional topological semimetals, even when spin-orbit coupling is negligible. A nontrivial orbital-momentum locking of multifold chiral fermions in the bulk leads to a pronounced OAM texture of the helicoid Fermi arcs at the surface. Our findings highlight the pivotal role of the orbital degree of freedom for the chirality and topology of electron states, in general, and pave the way towards the application of topological chiral semimetals in orbitronic devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_20607 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Orbital Topology of Chiral Crystals for Orbitronics Hagiwara, Kenta Chen, Ying-Jiun Go, Dongwook Tan, Xin Liang Grytsiuk, Sergii Yang, Kui-Hon Ou Shu, Guo-Jiun Chien, Jing Shen, Yi-Hsin Huang, Xiang-Lin Chou, Fang-Cheng Cojocariu, Iulia Feyer, Vitaliy Lin, Minn-Tsong Blügel, Stefan Schneider, Claus Michael Mokrousov, Yuriy Tusche, Christian Mesoscale and Nanoscale Physics Materials Science Chirality is ubiquitous in nature and manifests in a wide range of phenomena including chemical reactions, biological processes, and quantum transport of electrons. In quantum materials, the chirality of fermions, given by the relative directions between the electron spin and momentum, is connected to the band topology of electronic states. Here, we show that in structurally chiral materials like CoSi, the orbital angular momentum (OAM) serves as the main driver of a nontrivial band topology in this new class of unconventional topological semimetals, even when spin-orbit coupling is negligible. A nontrivial orbital-momentum locking of multifold chiral fermions in the bulk leads to a pronounced OAM texture of the helicoid Fermi arcs at the surface. Our findings highlight the pivotal role of the orbital degree of freedom for the chirality and topology of electron states, in general, and pave the way towards the application of topological chiral semimetals in orbitronic devices. |
| title | Orbital Topology of Chiral Crystals for Orbitronics |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2410.20607 |