Distinguishing specific-heat signatures in broken-inversion-symmetry multi-Weyl Kondo lattices

Determine whether the two-term electronic specific-heat signature in broken-inversion-symmetry multi-Weyl Kondo lattices, expected when the chemical potential lies at or near a Weyl node and given by C_V(T)/T = γ_0 + γ_n T^{2/n} (with γ_0 from metallic bands and γ_n T^{2/n} from semimetallic bands), can be experimentally disentangled from phonon contributions and other background signals to isolate the metallic and semimetallic electronic components.

Background

In broken-inversion-symmetry multi-Weyl Kondo systems, the electronic structure can feature both metallic and semimetallic bands when the chemical potential is pinned at or near one Weyl node. The authors argue that in this situation the low-temperature specific heat should reflect both contributions, leading to C_V(T)/T = γ_0 + γ_n T^{2/n}.

However, real materials also exhibit phonon contributions and other backgrounds that can mask or mimic similar temperature dependences. The authors explicitly note uncertainty about the experimental separability of these electronic signatures from such non-electronic contributions, framing an open question relevant to diagnosing correlated topological phases via thermodynamics.