p-Wave Orbital Angular Momentum Texture in a Chiral Crystal
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arXiv
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| Auteurs principaux: | , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866914568789295104 |
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| author | Oh, Dongjin Pacella, Chiara Luo, Xiangyu Jozwiak, Chris Bostwick, Aaron Rotenberg, Eli Leandersson, Mats Polley, Craig Rubio, Angel Di Sante, Domenico Comin, Riccardo |
| author_facet | Oh, Dongjin Pacella, Chiara Luo, Xiangyu Jozwiak, Chris Bostwick, Aaron Rotenberg, Eli Leandersson, Mats Polley, Craig Rubio, Angel Di Sante, Domenico Comin, Riccardo |
| contents | The spin and orbital angular momentum (SAM and OAM) are conceptually analogous, yet their roles in condensed matter systems have not been often treated on equal footing. While SAM has been extensively explored, OAM has long been regarded as quenched in crystalline environments and thus largely overlooked. Recent experimental and theoretical advances, however, have demonstrated that OAM can drive a variety of novel electronic phenomena, highlighting the importance of probing OAM textures in the electronic band structure. Here, we investigate the momentum-space OAM texture of (TaSe4)2I, a one-dimensional chiral crystal. Using circular-dichroism angle-resolved photoemission spectroscopy (CD-ARPES), we uncover a p-wave OAM texture accompanied by OAM dipole structures. This orbital p-wave texture is intimately connected to, and thus controllable by the chirality of the host lattice. Complementary spin-resolved ARPES measurements and first-principles calculations reveal that the OAM polarization overwhelmingly dominates the low-energy electronic properties of (TaSe4)2I, far exceeding the SAM polarization. These observations represent the experimental verification of a new type of OAM texture in crystalline materials. Most importantly, these findings underscore a promising material platform for spinless orbitronics applications and lay the foundation for realizing multipolar OAM textures-orbital counterparts of the spin texture in unconventional magnets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_15544 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | p-Wave Orbital Angular Momentum Texture in a Chiral Crystal Oh, Dongjin Pacella, Chiara Luo, Xiangyu Jozwiak, Chris Bostwick, Aaron Rotenberg, Eli Leandersson, Mats Polley, Craig Rubio, Angel Di Sante, Domenico Comin, Riccardo Materials Science The spin and orbital angular momentum (SAM and OAM) are conceptually analogous, yet their roles in condensed matter systems have not been often treated on equal footing. While SAM has been extensively explored, OAM has long been regarded as quenched in crystalline environments and thus largely overlooked. Recent experimental and theoretical advances, however, have demonstrated that OAM can drive a variety of novel electronic phenomena, highlighting the importance of probing OAM textures in the electronic band structure. Here, we investigate the momentum-space OAM texture of (TaSe4)2I, a one-dimensional chiral crystal. Using circular-dichroism angle-resolved photoemission spectroscopy (CD-ARPES), we uncover a p-wave OAM texture accompanied by OAM dipole structures. This orbital p-wave texture is intimately connected to, and thus controllable by the chirality of the host lattice. Complementary spin-resolved ARPES measurements and first-principles calculations reveal that the OAM polarization overwhelmingly dominates the low-energy electronic properties of (TaSe4)2I, far exceeding the SAM polarization. These observations represent the experimental verification of a new type of OAM texture in crystalline materials. Most importantly, these findings underscore a promising material platform for spinless orbitronics applications and lay the foundation for realizing multipolar OAM textures-orbital counterparts of the spin texture in unconventional magnets. |
| title | p-Wave Orbital Angular Momentum Texture in a Chiral Crystal |
| topic | Materials Science |
| url | https://arxiv.org/abs/2605.15544 |