The electronic structure of {\em R}NiC${}_2$ intermetallic compounds

Abstract

First-principles calculations of the electronic structure of members of the $R$NiC${}_2$ series are presented, and their Fermi surfaces investigated for nesting propensities which might be linked to the charge-density waves exhibited by certain members of the series ($R$ = Sm, Gd and Nd). Calculations of the generalized susceptibility, ${\chi }_0(\mathbf{q},\omega )$, show strong peaks at the same $\mathbf{q}$-vector in both the real and imaginary parts for these compounds. Moreover, this peak occurs at a wavevector which is very close to that experimentally observed in SmNiC${}_2$. In contrast, for LaNiC${}_2$ (which is a superconductor below 2.7K) as well as for ferromagnetic SmNiC${}_2$, there is no such sharp peak. This could explain the absence of a charge-density wave transition in the former, and the destruction of the charge-density wave that has been observed to accompany the onset of ferromagnetic order in the latter.

5 pages, 7 figures. Accepted for publication in Phys. Rev. B

References in corpus (2)

• Fermi surface nesting and the origin of Charge Density Waves in metals
• Fermi Surface Nesting and the Origin of the Charge Density Wave in NbSe${}_2$

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• k-resolved susceptibility function of 2H-TaSe2 from angle-resolved photoemission
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• Dirac lines and loop at the Fermi level in the Time-Reversal Symmetry Breaking Superconductor LaNiGa${}_2$
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• Tunable chirality of noncentrosymmetric magnetic Weyl semimetals
• Charge density wave and large non-saturating magnetoresistance in YNiC${}_2$ and LuNiC${}_2$
• Effects of pressure on the ferromagnetic state of the CDW compound SmNiC2
• Field induced suppression of charge density wave in GdNiC${}_2$
• $\mu$SR and inelastic neutron scattering investigations of the noncentrosymmetric antiferromagnet CeNiC${}_2$
• Correlation between charge density waves and antiferromagnetism in Nd${}_{1-x}$Gd${}_x$NiC${}_2$ solid solution
• Crossover from charge density wave stabilized antiferromagnetism to superconductivity in Nd${}_{1-x}$La${}_x$NiC${}_2$ compounds
• Coexistence of charge density wave and field-tuned magnetic states in TmNiC${}_2$
• Competing charge density wave phases in YNiC2