4 papers
Ultrafast Fluence-Reversal Fingerprint of Fragile Kondo Hybridization in CePtIn
Xin-Yi Tian, Qi-Yi Wu, Chen Zhang +13
The emergence of heavy quasiparticles in a Kondo lattice is usually viewed as the formation of a low-energy hybridization gap. Whether this gap represents a rigid electronic struct…
Ultrafast Stiffening of the Lattice Potential and Metastable State Formation in 1-TiSe
Xue-Qing Ye, Hao Liu, Qi-Yi Wu +8
We use ultrafast optical spectroscopy to investigate the electronic and lattice dynamics of the charge-density wave (CDW) material 1-TiSe across various temperatures and pum…
Ultrafast photoinduced phase transition in the antiferromagnetic Dirac semimetal EuAgAs
Hao Liu, Chen Zhang, Qi-Yi Wu +12
We report the observation of a light-induced subpicosecond phase transition in the antiferromagnetic Dirac semimetal EuAgAs, achieved through ultrafast optical excitation. Using ul…
Interplay of electron-phonon coupling, pseudogap, and superconductivity in CsCaFeAsF studied using ultrafast optical spectroscopy
Qi-Yi Wu, Chen Zhang, Bai-Zhuo Li +9
The quasiparticle relaxation dynamics of the iron-based superconductor CsCaFeAsF ( 29 K) were investigated using ultrafast optical spectroscopy. A pseud…