Fig. 1: Magnetostructures and the reconstruction of Fermi surfaces.
From: Devil's staircase transition of the electronic structures in CeSb
a Various magnetostructures at zero-field below TN ~ 17 K, which differ in the stacking sequence of the Ising-like ferromagnetic (001) planes (red and blue arrows) with the square wave modulation (q)8,9. The antiferromagnetic (AF) phase with the double-layer modulation is most favored at low temperature below TAF ~ 8 K while various antiferroparamagnetic (AFP) phases appear as transitional phases. The cruciform 4fΓ8 state is the ground state of the 4f level in the ferromagnetic planes while the 4fΓ7 ground state remains in the paramagnetic (P) planes (circles)23,24. The crystal lattice is slightly distorted below TN with a shrink along the magnetic moment and q direction22. The detailed magnetostructure of AFP6 phase has not been determined yet10. b Fermi surfaces (FSs) in Brillouin zone (BZ) of the fcc lattice and c the folded FSs in the reduced tetragonal BZ under the AF modulation (q = 1/2).
