Light-induced percolative topological phase transition in type-II Weyl semimetal WTe2

Xiaoyue Zhou; Fu Deng; Yifan Gao; Yi Chan; Shulei Li; Ning Wang; Junwei Liu; Jingdi Zhang

Light-induced percolative topological phase transition in type-II Weyl semimetal WTe2

Materials Science 2024-09-04 v2

Authors: Xiaoyue Zhou , Fu Deng , Yifan Gao , Yi Chan , Shulei Li , Ning Wang , Junwei Liu , Jingdi Zhang

Abstract

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.

Keywords

Weyl semimetal topological phase transition terahertz photoconductivity light-induced percolative interaction

Cite

@article{arxiv.2406.16663,
  title  = {Light-induced percolative topological phase transition in type-II Weyl semimetal WTe2},
  author = {Xiaoyue Zhou and Fu Deng and Yifan Gao and Yi Chan and Shulei Li and Ning Wang and Junwei Liu and Jingdi Zhang},
  journal= {arXiv preprint arXiv:2406.16663},
  year   = {2024}
}

Light-induced percolative topological phase transition in type-II Weyl semimetal WTe2

Abstract

Keywords

Cite

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