Unusual photoinduced crystal structure dynamics in TaTe with double zigzag chain superstructure
arXiv:2404.08256 · doi:10.35848/1882-0786/ad3b61
Abstract
Transition metal dichalcogenides with superperiodic lattice distortions have been widely investigated as the platform of ultrafast structural phase manipulations. Here we performed ultrafast electron diffraction on room-temperature TaTe, which exhibits peculiar double zigzag chain pattern of Ta atoms. From the time-dependent electron diffraction pattern, we revealed a photoinduced change in the crystal structure occurring within <0.5 ps, though there is no corresponding high-temperature equilibrium phase. We further clarified the slower response (~1.5 ps) reflecting the lattice thermalization. Our result suggests the unusual ultrafast crystal structure dynamics specific to the non-equilibrium transient process in TaTe.
arXiv commentThe paer is accepted in Applied Physics Express.(Open Access)
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