Fig. 1. 4f spectra of YbInCu4. The black lines and the black dots are the 4f spectra at 20 K and 200 K, respectively. The peaks between the Fermi energy and 2 eV are the spin-orbit doublet of Yb 4f13, the peaks in the range of 6 eV to 12 eV the multiplet structures of Yb f12, and the peaks of 2 eV and 4.5 eV correspond to Cu 3d spectra.
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