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. 2021 Sep 15;12:5345. doi: 10.1038/s41467-021-25705-1

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© The Author(s) 2021

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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 5 — a High-field magnetoresistance of FeSn/STO at different temperatures. b Shubnikov-de Haas (SdH) oscillations at different temperatures, extracted from a. c Fast Fourier Transform (FFT) of the SdH oscillations in b. The inset shows the temperature-dependent SdH oscillation amplitudes (marker) and their fit to Lifshitz-Kosevich (LK) formula (dashed line), from which the effective mass of m^⋆ = 0.38 m₀ was extracted. d Field angle-dependent SdH oscillation frequencies. Different fitting methods were applied to data sets from experiments in two different magnet systems (see Supplementary Note 19). The overlaid dashed lines denote expected Fermi surface cross-sections assuming different Fermi pocket ellipticity. a and b, respectively, are the minor and major axes of the ellipse, also corresponding to the Fermi wavevectors along the ab-plane and the c axis of FeSn.