Research Progress on Ni-Based Antiperovskite Compounds
(a) Surface plot (and contour plot below) of the van Hove singularity in (relative to ) in the G-M-X plane, with at the right-hand corner (planar coordinates are given in units of 2π/a) [Reprinted with permission from H. Rosner et al., Phys. Rev. Lett. 88, 027001 (2002)]. (b) The peak structure in the electronic density of state around [Reprinted with permission from D. J. Singh et al., Phys. Rev. B 64, 140507 (2001)].