| Autor: |
Zhou, Xiaoyue, Deng, Fu, Gao, Yifan, Chan, Yi, Li, Shulei, Wang, Ning, Liu, Junwei, Zhang, Jingdi |
| Rok vydání: |
2024 |
| Předmět: |
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| Druh dokumentu: |
Working Paper |
| Popis: |
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. |
| Databáze: |
arXiv |
| Externí odkaz: |
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