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. 2024 Jun 28;15:5472. doi: 10.1038/s41467-024-49716-w

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© The Author(s) 2024

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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Fig. 2 — a THz pump—IR probe spectroscopy with external magnetic field applied perpendicular to the sample plane, along the c-axis. The changes of THz-induced probe polarization rotation α_F are measured by a balanced photodetector. Electro-optical sampling of the THz pulse (with nitrogen purge) is shown in both the time and frequency domains. b Time domain data for polarization rotation α_F for a series of external magnetic field values measured at T = 6 K.