Photo-induced manipulation and relaxation dynamics of Weyl-semimetals
Abstract The use of ultrashort laser pulses to manipulate properties or investigate a materials response on femtosecond time-scales enables detailed tracking of charge, spin, and lattice degrees of freedom. When pushing the limits of experimental resolution, connection to theoretical modeling become...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-07-01
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| Series: | npj Computational Materials |
| Online Access: | https://doi.org/10.1038/s41524-025-01708-0 |
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| _version_ | 1849764552388902912 |
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| author | Jakub Šebesta Oscar Grånäs |
| author_facet | Jakub Šebesta Oscar Grånäs |
| author_sort | Jakub Šebesta |
| collection | DOAJ |
| description | Abstract The use of ultrashort laser pulses to manipulate properties or investigate a materials response on femtosecond time-scales enables detailed tracking of charge, spin, and lattice degrees of freedom. When pushing the limits of experimental resolution, connection to theoretical modeling becomes increasingly important to infer causality relations. Weyl-semimetals are a particular class of materials of recent focus due to the topological protection of the Weyl-nodes, resulting in a number of fundamentally interesting phenomena. This work provides a first-principles framework based on time-dependent density-functional theory for tracking the distribution of Weyl-nodes in the Brillouin-zone following an excitation by a laser pulse. Investigating the prototype material TaAs, we show that residual shifts in the Weyl-Nodes’ position and energy distribution are induced by a photo-excitation within femto-seconds through band-structure renormalization. Further, we provide an analysis of the relaxation pathway of the photoexcited band-structure through lattice vibrations. |
| format | Article |
| id | doaj-art-e8a78fa706af4228b475ef59e9ddf3e7 |
| institution | DOAJ |
| issn | 2057-3960 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Computational Materials |
| spelling | doaj-art-e8a78fa706af4228b475ef59e9ddf3e72025-08-20T03:05:06ZengNature Portfolionpj Computational Materials2057-39602025-07-0111111010.1038/s41524-025-01708-0Photo-induced manipulation and relaxation dynamics of Weyl-semimetalsJakub Šebesta0Oscar Grånäs1Division of Materials Theory, Department of Physics and Astronomy, Uppsala UniversityDivision of Materials Theory, Department of Physics and Astronomy, Uppsala UniversityAbstract The use of ultrashort laser pulses to manipulate properties or investigate a materials response on femtosecond time-scales enables detailed tracking of charge, spin, and lattice degrees of freedom. When pushing the limits of experimental resolution, connection to theoretical modeling becomes increasingly important to infer causality relations. Weyl-semimetals are a particular class of materials of recent focus due to the topological protection of the Weyl-nodes, resulting in a number of fundamentally interesting phenomena. This work provides a first-principles framework based on time-dependent density-functional theory for tracking the distribution of Weyl-nodes in the Brillouin-zone following an excitation by a laser pulse. Investigating the prototype material TaAs, we show that residual shifts in the Weyl-Nodes’ position and energy distribution are induced by a photo-excitation within femto-seconds through band-structure renormalization. Further, we provide an analysis of the relaxation pathway of the photoexcited band-structure through lattice vibrations.https://doi.org/10.1038/s41524-025-01708-0 |
| spellingShingle | Jakub Šebesta Oscar Grånäs Photo-induced manipulation and relaxation dynamics of Weyl-semimetals npj Computational Materials |
| title | Photo-induced manipulation and relaxation dynamics of Weyl-semimetals |
| title_full | Photo-induced manipulation and relaxation dynamics of Weyl-semimetals |
| title_fullStr | Photo-induced manipulation and relaxation dynamics of Weyl-semimetals |
| title_full_unstemmed | Photo-induced manipulation and relaxation dynamics of Weyl-semimetals |
| title_short | Photo-induced manipulation and relaxation dynamics of Weyl-semimetals |
| title_sort | photo induced manipulation and relaxation dynamics of weyl semimetals |
| url | https://doi.org/10.1038/s41524-025-01708-0 |
| work_keys_str_mv | AT jakubsebesta photoinducedmanipulationandrelaxationdynamicsofweylsemimetals AT oscargranas photoinducedmanipulationandrelaxationdynamicsofweylsemimetals |