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. 2020 Aug 10;11:4003. doi: 10.1038/s41467-020-17464-2

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© The Author(s) 2020

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. 2 — a Differential conductance spectra taken along the arrow draw on the Co₃Sn layer shown in the inset. b Spatially averaged dI/dV spectra for Co₃Sn layer and Sn₂ layer, respectively. c dI/dV spectrum for Co₃Sn layer taken at different external magnetic fields applied along the c axis. d Fitting of the spectral peak in the Co₃Sn layer with a Lorentzian. e Second differential conductance for the data in d with the extra Gaussian-like peaks marked by blue lines centered at the energy E_M = ±15 meV marked by red arrows. The inset plot shows the E_M value is independent of the external magnetic field.