Ultrafast X-Ray Scattering Reveals Composite Amplitude Collective Mode in the Weyl Charge Density Wave Material (TaSe4)2 i

Quynh L. Nguyen; Ryan A. Duncan; Gal Orenstein; Yijing Huang; Viktor Krapivin; Gilberto De La Peña; Chance Ornelas-Skarin; David A. Reis; Peter Abbamonte; Simon Bettler; Matthieu Chollet; Matthias C. Hoffmann; Matthew Hurley; Soyeun Kim; Patrick S. Kirchmann; Yuya Kubota; Fahad Mahmood; Alexander Miller; Taito Osaka; Kejian Qu; Takahiro Sato; Daniel P. Shoemaker; Nicholas Sirica; Sanghoon Song; Jade Stanton; Samuel W. Teitelbaum; Sean E. Tilton; Tadashi Togashi; Diling Zhu; Mariano Trigo

doi:10.1103/PhysRevLett.131.076901

Ultrafast X-Ray Scattering Reveals Composite Amplitude Collective Mode in the Weyl Charge Density Wave Material (TaSe4)2 i

Quynh L. Nguyen, Ryan A. Duncan, Gal Orenstein, Yijing Huang, Viktor Krapivin, Gilberto De La Peña, Chance Ornelas-Skarin, David A. Reis, Peter Abbamonte, Simon Bettler, Matthieu Chollet, Matthias C. Hoffmann, Matthew Hurley, Soyeun Kim, Patrick S. Kirchmann, Yuya Kubota, Fahad Mahmood, Alexander Miller, Taito Osaka, Kejian QuTakahiro Sato, Daniel P. Shoemaker, Nicholas Sirica, Sanghoon Song, Jade Stanton, Samuel W. Teitelbaum, Sean E. Tilton, Tadashi Togashi, Diling Zhu, Mariano Trigo

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Abstract

We report ultrafast x-ray scattering experiments of the quasi-1D charge density wave (CDW) material (TaSe4)2I following ultrafast infrared photoexcitation. From the time-dependent diffraction signal at the CDW sidebands we identify a 0.11 THz amplitude mode derived primarily from a transverse acoustic mode of the high-symmetry structure. From our measurements we determine that this mode interacts with the valence charge indirectly through another collective mode, and that the CDW system in (TaSe4)2I has a composite nature supporting multiple dynamically active structural degrees of freedom.

Original language	English (US)
Article number	076901
Journal	Physical review letters
Volume	131
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.131.076901
State	Published - Aug 18 2023

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General Physics and Astronomy

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Nguyen, Q. L., Duncan, R. A., Orenstein, G., Huang, Y., Krapivin, V., De La Peña, G., Ornelas-Skarin, C., Reis, D. A., Abbamonte, P., Bettler, S., Chollet, M., Hoffmann, M. C., Hurley, M., Kim, S., Kirchmann, P. S., Kubota, Y., Mahmood, F., Miller, A., Osaka, T., ... Trigo, M. (2023). Ultrafast X-Ray Scattering Reveals Composite Amplitude Collective Mode in the Weyl Charge Density Wave Material (TaSe4)2 i. Physical review letters, 131(7), Article 076901. https://doi.org/10.1103/PhysRevLett.131.076901

Nguyen, QL, Duncan, RA, Orenstein, G, Huang, Y, Krapivin, V, De La Peña, G, Ornelas-Skarin, C, Reis, DA, Abbamonte, P, Bettler, S, Chollet, M, Hoffmann, MC, Hurley, M, Kim, S, Kirchmann, PS, Kubota, Y, Mahmood, F, Miller, A, Osaka, T, Qu, K, Sato, T, Shoemaker, DP, Sirica, N, Song, S, Stanton, J, Teitelbaum, SW, Tilton, SE, Togashi, T, Zhu, D & Trigo, M 2023, 'Ultrafast X-Ray Scattering Reveals Composite Amplitude Collective Mode in the Weyl Charge Density Wave Material (TaSe4)2 i', Physical review letters, vol. 131, no. 7, 076901. https://doi.org/10.1103/PhysRevLett.131.076901

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title = "Ultrafast X-Ray Scattering Reveals Composite Amplitude Collective Mode in the Weyl Charge Density Wave Material (TaSe4)2 i",

abstract = "We report ultrafast x-ray scattering experiments of the quasi-1D charge density wave (CDW) material (TaSe4)2I following ultrafast infrared photoexcitation. From the time-dependent diffraction signal at the CDW sidebands we identify a 0.11 THz amplitude mode derived primarily from a transverse acoustic mode of the high-symmetry structure. From our measurements we determine that this mode interacts with the valence charge indirectly through another collective mode, and that the CDW system in (TaSe4)2I has a composite nature supporting multiple dynamically active structural degrees of freedom.",

author = "Nguyen, {Quynh L.} and Duncan, {Ryan A.} and Gal Orenstein and Yijing Huang and Viktor Krapivin and {De La Pe{\~n}a}, Gilberto and Chance Ornelas-Skarin and Reis, {David A.} and Peter Abbamonte and Simon Bettler and Matthieu Chollet and Hoffmann, {Matthias C.} and Matthew Hurley and Soyeun Kim and Kirchmann, {Patrick S.} and Yuya Kubota and Fahad Mahmood and Alexander Miller and Taito Osaka and Kejian Qu and Takahiro Sato and Shoemaker, {Daniel P.} and Nicholas Sirica and Sanghoon Song and Jade Stanton and Teitelbaum, {Samuel W.} and Tilton, {Sean E.} and Tadashi Togashi and Diling Zhu and Mariano Trigo",

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year = "2023",

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doi = "10.1103/PhysRevLett.131.076901",

language = "English (US)",

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AU - Nguyen, Quynh L.

AU - Duncan, Ryan A.

AU - Orenstein, Gal

AU - Huang, Yijing

AU - Krapivin, Viktor

AU - De La Peña, Gilberto

AU - Ornelas-Skarin, Chance

AU - Reis, David A.

AU - Abbamonte, Peter

AU - Bettler, Simon

AU - Chollet, Matthieu

AU - Hoffmann, Matthias C.

AU - Hurley, Matthew

AU - Kim, Soyeun

AU - Kirchmann, Patrick S.

AU - Kubota, Yuya

AU - Mahmood, Fahad

AU - Miller, Alexander

AU - Osaka, Taito

AU - Qu, Kejian

AU - Sato, Takahiro

AU - Shoemaker, Daniel P.

AU - Sirica, Nicholas

AU - Song, Sanghoon

AU - Stanton, Jade

AU - Teitelbaum, Samuel W.

AU - Tilton, Sean E.

AU - Togashi, Tadashi

AU - Zhu, Diling

AU - Trigo, Mariano

PY - 2023/8/18

Y1 - 2023/8/18

N2 - We report ultrafast x-ray scattering experiments of the quasi-1D charge density wave (CDW) material (TaSe4)2I following ultrafast infrared photoexcitation. From the time-dependent diffraction signal at the CDW sidebands we identify a 0.11 THz amplitude mode derived primarily from a transverse acoustic mode of the high-symmetry structure. From our measurements we determine that this mode interacts with the valence charge indirectly through another collective mode, and that the CDW system in (TaSe4)2I has a composite nature supporting multiple dynamically active structural degrees of freedom.

AB - We report ultrafast x-ray scattering experiments of the quasi-1D charge density wave (CDW) material (TaSe4)2I following ultrafast infrared photoexcitation. From the time-dependent diffraction signal at the CDW sidebands we identify a 0.11 THz amplitude mode derived primarily from a transverse acoustic mode of the high-symmetry structure. From our measurements we determine that this mode interacts with the valence charge indirectly through another collective mode, and that the CDW system in (TaSe4)2I has a composite nature supporting multiple dynamically active structural degrees of freedom.

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Ultrafast X-Ray Scattering Reveals Composite Amplitude Collective Mode in the Weyl Charge Density Wave Material (TaSe4)2 i

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