Light-induced percolative topological phase transition in type-II Weyl semimetal WTe2
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arXiv
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866909301965062144 |
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| author | Zhou, Xiaoyue Deng, Fu Gao, Yifan Chan, Yi Li, Shulei Wang, Ning Liu, Junwei Zhang, Jingdi |
| author_facet | Zhou, Xiaoyue Deng, Fu Gao, Yifan Chan, Yi Li, Shulei Wang, Ning Liu, Junwei Zhang, Jingdi |
| contents | We report on an ultrafast terahertz free-carrier dynamic study of a photo-excited WTe2 thin film. In the photo-excited state, we observe a metastable electronic state featuring negative differential terahertz photoconductivity and reduced scattering rate. Detailed electrodynamics analysis and first-principal calculation attribute it to light-induced topological phase transition, reducing density of states near the Fermi level. Furthermore, the emergence of an unconventional temporal isosbestic point marks a dynamic universality, strongly suggesting a percolative interaction between the two topologically distinct phases. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_16663 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Light-induced percolative topological phase transition in type-II Weyl semimetal WTe2 Zhou, Xiaoyue Deng, Fu Gao, Yifan Chan, Yi Li, Shulei Wang, Ning Liu, Junwei Zhang, Jingdi Materials Science We report on an ultrafast terahertz free-carrier dynamic study of a photo-excited WTe2 thin film. In the photo-excited state, we observe a metastable electronic state featuring negative differential terahertz photoconductivity and reduced scattering rate. Detailed electrodynamics analysis and first-principal calculation attribute it to light-induced topological phase transition, reducing density of states near the Fermi level. Furthermore, the emergence of an unconventional temporal isosbestic point marks a dynamic universality, strongly suggesting a percolative interaction between the two topologically distinct phases. |
| title | Light-induced percolative topological phase transition in type-II Weyl semimetal WTe2 |
| topic | Materials Science |
| url | https://arxiv.org/abs/2406.16663 |