Chirality manipulation of ultrafast phase switches in a correlated CDW-Weyl semimetal
Abstract Light engineering of correlated states in topological materials provides a new avenue of achieving exotic topological phases inaccessible by conventional tuning methods. Here we demonstrate a light control of correlation gaps in a model charge-density-wave (CDW) and polaron insulator (TaSe4...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-01-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-45036-1 |
| _version_ | 1797276396302630912 |
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| author | Bing Cheng Di Cheng Tao Jiang Wei Xia Boqun Song Martin Mootz Liang Luo Ilias E. Perakis Yongxin Yao Yanfeng Guo Jigang Wang |
| author_facet | Bing Cheng Di Cheng Tao Jiang Wei Xia Boqun Song Martin Mootz Liang Luo Ilias E. Perakis Yongxin Yao Yanfeng Guo Jigang Wang |
| author_sort | Bing Cheng |
| collection | DOAJ |
| description | Abstract Light engineering of correlated states in topological materials provides a new avenue of achieving exotic topological phases inaccessible by conventional tuning methods. Here we demonstrate a light control of correlation gaps in a model charge-density-wave (CDW) and polaron insulator (TaSe4)2I recently predicted to be an axion insulator. Our ultrafast terahertz photocurrent spectroscopy reveals a two-step, non-thermal melting of polarons and electronic CDW gap via the fluence dependence of a longitudinal circular photogalvanic current. This helicity-dependent photocurrent reveals continuous ultrafast phase switches from the polaronic state to the CDW (axion) phase, and finally to a hidden Weyl phase as the pump fluence increases. Additional distinctive attributes aligning with the light-induced switches include: the mode-selective coupling of coherent phonons to the polaron and CDW modulation, and the emergence of a non-thermal chiral photocurrent above the pump threshold of CDW-related phonons. The demonstrated ultrafast chirality control of correlated topological states here holds large potentials for realizing axion electrodynamics and advancing quantum-computing applications. |
| first_indexed | 2024-03-07T15:28:37Z |
| format | Article |
| id | doaj.art-5782316ee5a943e9b5c91387b394ce5e |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-07T15:28:37Z |
| publishDate | 2024-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-5782316ee5a943e9b5c91387b394ce5e2024-03-05T16:35:00ZengNature PortfolioNature Communications2041-17232024-01-011511810.1038/s41467-024-45036-1Chirality manipulation of ultrafast phase switches in a correlated CDW-Weyl semimetalBing Cheng0Di Cheng1Tao Jiang2Wei Xia3Boqun Song4Martin Mootz5Liang Luo6Ilias E. Perakis7Yongxin Yao8Yanfeng Guo9Jigang Wang10Ames National LaboratoryAmes National LaboratoryAmes National LaboratorySchool of Physical Science and Technology, ShanghaiTech UniversityAmes National LaboratoryAmes National LaboratoryAmes National LaboratoryDepartment of Physics, University of Alabama at BirminghamAmes National LaboratorySchool of Physical Science and Technology, ShanghaiTech UniversityAmes National LaboratoryAbstract Light engineering of correlated states in topological materials provides a new avenue of achieving exotic topological phases inaccessible by conventional tuning methods. Here we demonstrate a light control of correlation gaps in a model charge-density-wave (CDW) and polaron insulator (TaSe4)2I recently predicted to be an axion insulator. Our ultrafast terahertz photocurrent spectroscopy reveals a two-step, non-thermal melting of polarons and electronic CDW gap via the fluence dependence of a longitudinal circular photogalvanic current. This helicity-dependent photocurrent reveals continuous ultrafast phase switches from the polaronic state to the CDW (axion) phase, and finally to a hidden Weyl phase as the pump fluence increases. Additional distinctive attributes aligning with the light-induced switches include: the mode-selective coupling of coherent phonons to the polaron and CDW modulation, and the emergence of a non-thermal chiral photocurrent above the pump threshold of CDW-related phonons. The demonstrated ultrafast chirality control of correlated topological states here holds large potentials for realizing axion electrodynamics and advancing quantum-computing applications.https://doi.org/10.1038/s41467-024-45036-1 |
| spellingShingle | Bing Cheng Di Cheng Tao Jiang Wei Xia Boqun Song Martin Mootz Liang Luo Ilias E. Perakis Yongxin Yao Yanfeng Guo Jigang Wang Chirality manipulation of ultrafast phase switches in a correlated CDW-Weyl semimetal Nature Communications |
| title | Chirality manipulation of ultrafast phase switches in a correlated CDW-Weyl semimetal |
| title_full | Chirality manipulation of ultrafast phase switches in a correlated CDW-Weyl semimetal |
| title_fullStr | Chirality manipulation of ultrafast phase switches in a correlated CDW-Weyl semimetal |
| title_full_unstemmed | Chirality manipulation of ultrafast phase switches in a correlated CDW-Weyl semimetal |
| title_short | Chirality manipulation of ultrafast phase switches in a correlated CDW-Weyl semimetal |
| title_sort | chirality manipulation of ultrafast phase switches in a correlated cdw weyl semimetal |
| url | https://doi.org/10.1038/s41467-024-45036-1 |
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