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. 2021 May 3;12:2494. doi: 10.1038/s41467-021-22784-y

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© The Author(s) 2021, corrected publication 2024

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Fig. 4 — a XRD θ–2θ (Cu Kα) scans before exfoliation (black) and after exfoliation (blue). Sapphire substrate reflections are marked by asterisks. In addition to the epitaxial lll-type reflections, a small 004 reflection is observed and marked with a diamond. b Photos of GdPtSb membrane exfoliation from a 1 × 1 cm² substrate. The left image shows a flat exfoliated membrane bonded to a glass slide. The right image shows the substrate side after exfoliation. In the region that had been covered with graphene (~6 × 6 mm² square at center), the GdPtSb membrane has been exfoliated to yield a transparent sapphire substrate. In the region not covered by graphene, the GdPtSb film remains adhered to the substrate.