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cond-mat.mtrl-sci2025★ 4 cited
Unveiling Symmetry Instability induced by Topological Phase Transitions
Liang Luo, Boqun Song, Genda Gu +5
The symmetry-topology interplay dictates how to define order parameters and classify material ordered phases. However, current understanding of this interplay has been predominatel…
cond-mat.mtrl-sci2021
Ultrafast generation and detection of propagating coherent acoustic phonon wave packets in ultra-thin iron pnictide films
D. Cheng, B. Song, J. H. Kang +9
We observe pronounced oscillations in differential reflectivity of 9 nm and 60 nm BaFe\textsubscript{2}As\textsubscript{2} (Ba-122) thin films using ultrafast optical spectroscopy.…
cond-mat.mtrl-sci2018
Ultrafast Terahertz Conductivity Probes of Topologically Enhanced Surface Transport Driven by Mid-Infrared Laser Pulses in BiSe
L. Luo, X. Yang, X. Liu +8
The recent discovery of topology-protected charge transport of ultimate thinness on surfaces of three-dimensional topological insulators (TIs) are breaking new ground in fundamenta…