Fig. 4: Temperature dependence of the electron bands in the ab-domain.
From: Unconventional band splitting of CeSb in the devil’s staircase transition
(a, c) Temperature-dependent ARPES spectra of the electron bands in the ab-domain, obtained using 28 eV and 21.2 eV photons, respectively. (b, d) Energy distribution curves (EDCs) extracted from (a, c) along the white dashed lines, respectively, with offset for clarity. Black lines represent fits to the EDC peaks. Red and blue dots indicate the peak positions of the outer and inner bands, respectively. Purple lines in b indicate the background distribution. e Schematic illustration of the devil’s staircase. f Temperature dependence of the relative intensity of the outer bands (\({I}_{{outer}}={outer}/({inner}+{outer})\)) from three different samples. The calculated occupancy of the paramagnetic layers (\({I}_{{PM}}\)), derived from the DFT + U calculations based on the devil’s staircase model, is shown for comparison. g Temperature dependence of the energy separation between the inner and outer bands.
