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. 2023 May 3;617(7959):73–78. doi: 10.1038/s41586-023-05853-8

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Extended Data Fig. 8 — (a) Normalized time-resolved MOKE signals for different phonon excitations at T = 6 K. (b) Fitted rise times of the pump-induced MOKE signals (circles) and the equilibrium phonon lifetimes (squares) as a function of temperature. The rise times are extracted from the fits of the data to Eq. 23. The phonon lifetimes are determined from the inverse linewidth of the modes in infrared vibrational spectra taken at different temperatures (Extended Data Fig. 10).