Understanding chiral charge-density wave by frozen chiral phonon
Abstract Charge density wave (CDW) is discovered within a wide interval in solids, however, its microscopic nature is still not transparent in most realistic materials, and the recently studied chiral ones with chiral structural distortion remain unclear. In this paper, we try to understand the driv...
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Nature Portfolio
2024-11-01
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| Series: | npj Computational Materials |
| Online Access: | https://doi.org/10.1038/s41524-024-01440-1 |
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| author | Shuai Zhang Kaifa Luo Tiantian Zhang |
| author_facet | Shuai Zhang Kaifa Luo Tiantian Zhang |
| author_sort | Shuai Zhang |
| collection | DOAJ |
| description | Abstract Charge density wave (CDW) is discovered within a wide interval in solids, however, its microscopic nature is still not transparent in most realistic materials, and the recently studied chiral ones with chiral structural distortion remain unclear. In this paper, we try to understand the driving forces of chiral CDW transition by chiral phonons from the electron-phonon coupling scenario. We use the prototypal monolayer 1T-TiSe2 as a case study to unveil the absence of chirality in the CDW transition and propose a general approach, i.e., symmetry-breaking stimuli, to engineer the chirality of CDW in experiments. Inelastic scattering patterns are also studied as a benchmark of chiral CDW (CCDW, which breaks the mirror/inversion symmetry in 2D/3D systems). We notice that the anisotropy changing of Bragg peak profiles, which is contributed by the soft chiral phonons, can show a remarkable signature for CCDW. Our findings pave a path to understanding the CCDW from the chiral phonon perspective, especially in van der Waals materials, and provides a powerful way to manipulate the chirality of CDW. |
| format | Article |
| id | doaj-art-78089a2d35e0465090b2d62f2446df85 |
| institution | OA Journals |
| issn | 2057-3960 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Computational Materials |
| spelling | doaj-art-78089a2d35e0465090b2d62f2446df852025-08-20T02:22:20ZengNature Portfolionpj Computational Materials2057-39602024-11-011011710.1038/s41524-024-01440-1Understanding chiral charge-density wave by frozen chiral phononShuai Zhang0Kaifa Luo1Tiantian Zhang2Institute of Theoretical Physics, Chinese Academy of SciencesDepartment of Physics, University of Texas at AustinInstitute of Theoretical Physics, Chinese Academy of SciencesAbstract Charge density wave (CDW) is discovered within a wide interval in solids, however, its microscopic nature is still not transparent in most realistic materials, and the recently studied chiral ones with chiral structural distortion remain unclear. In this paper, we try to understand the driving forces of chiral CDW transition by chiral phonons from the electron-phonon coupling scenario. We use the prototypal monolayer 1T-TiSe2 as a case study to unveil the absence of chirality in the CDW transition and propose a general approach, i.e., symmetry-breaking stimuli, to engineer the chirality of CDW in experiments. Inelastic scattering patterns are also studied as a benchmark of chiral CDW (CCDW, which breaks the mirror/inversion symmetry in 2D/3D systems). We notice that the anisotropy changing of Bragg peak profiles, which is contributed by the soft chiral phonons, can show a remarkable signature for CCDW. Our findings pave a path to understanding the CCDW from the chiral phonon perspective, especially in van der Waals materials, and provides a powerful way to manipulate the chirality of CDW.https://doi.org/10.1038/s41524-024-01440-1 |
| spellingShingle | Shuai Zhang Kaifa Luo Tiantian Zhang Understanding chiral charge-density wave by frozen chiral phonon npj Computational Materials |
| title | Understanding chiral charge-density wave by frozen chiral phonon |
| title_full | Understanding chiral charge-density wave by frozen chiral phonon |
| title_fullStr | Understanding chiral charge-density wave by frozen chiral phonon |
| title_full_unstemmed | Understanding chiral charge-density wave by frozen chiral phonon |
| title_short | Understanding chiral charge-density wave by frozen chiral phonon |
| title_sort | understanding chiral charge density wave by frozen chiral phonon |
| url | https://doi.org/10.1038/s41524-024-01440-1 |
| work_keys_str_mv | AT shuaizhang understandingchiralchargedensitywavebyfrozenchiralphonon AT kaifaluo understandingchiralchargedensitywavebyfrozenchiralphonon AT tiantianzhang understandingchiralchargedensitywavebyfrozenchiralphonon |