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. 2018 Jan 18;9:282. doi: 10.1038/s41467-017-02739-y

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© The Author(s) 2018

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Fig. 2 — Superconducting gap anisotropy of twinned FeSe. a Definition of FS angle in case of p-polarized light. Red points indicate the k_F positions where energy distribution curves (EDCs) in b and c are taken. b EDCs at various k_F points along the FS at 15 K (gray) and 2 K (red). Black lines show the fits to the BCS fitting function. FS angle defined in a is shown for each EDC. c The same as b but symmetrized with respect to E_F. d–f The same as a–c but taken with s-polarized light