Element-specific ultrafast lattice dynamics in monolayer WSe2

Jung, Hyein; Dong, Shuo; Zahn, Daniela; Vasileiadis, Thomas; Seiler, Helene; Schneider, R.; de Vasconcellos, S. Michaelis; Taylor, Victoria; Bratschitsch, R.; Ernstorfer, Ralph; Windsor, Yoav William

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Element-specific ultrafast lattice dynamics in monolayer WSe₂

MPS-Authors

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Jung, Hyein
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons206871

Dong, Shuo
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons195530

Zahn, Daniela
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons138038

Vasileiadis, Thomas
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons222712

Seiler, Helene
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons269274

Taylor, Victoria
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21497

Ernstorfer, Ralph
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Windsor, Yoav William
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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arXiv:2405.17099.pdf
(プレプリント), 704KB

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引用

Jung, H., Dong, S., Zahn, D., Vasileiadis, T., Seiler, H., Schneider, R., de Vasconcellos, S. M., Taylor, V., Bratschitsch, R., Ernstorfer, R., & Windsor, Y. W. (in preparation). Element-specific ultrafast lattice dynamics in monolayer WSe₂.

引用: https://hdl.handle.net/21.11116/0000-000F-5AC1-2

要旨

We study monolayer WSe₂ using ultrafast electron diffraction. We introduce an approach to quantitatively extract atomic-site-specific information, providing an element-specific view of incoherent atomic vibrations following femtosecond excitation. Via differences between W and Se vibrations, we identify stages in the nonthermal evolution of the lattice. Combined with a calculated phonon dispersion, this element specificity enables us to identify a long-lasting overpopulation of specific optical phonons, and to interpret the stages as energy transfer processes between specific phonon groups. These results demonstrate the appeal of resolving element-specific vibrational information in the ultrafast time domain.