Fig. 5.

DMFT $k$-integrated temperature dependence of Ce 4$f$ states for CeCo${\mathrm{I}\mathrm{n}}_5$. (A and B) $T$-dependent $k$-integrated DMFT 4$f$-DOS spectra with (B) a Fermi-edge cutoff and experimental energy broadening of 15 meV. (C) Comparison of experimental and simulated $T$ dependences of $f$-peak amplitudes after background subtraction. (D and E) Spectral weight image and stack plot of the $T$-dependent merging of the ground state and first excited CEF peaks. (F) (left) $T$ dependence of the DMFT total FS volume converted to electron occupation ($n_{FS}$) exhibiting an $\sim$1-electron gain at low $T$ and (right) the DMFT total localized-$f$ occupation ($n_f$) exhibiting a tiny 0.01-electron loss at low $T$. Crystalline electric-field levels (CF^1,2) and their crystal field sideband peaks (${\text{CF}}_{\mathrm{1,2}}^{\prime }$) are labeled.