Fig. 5: The Wiedemann–Franz Law.
From: Quantized thermoelectric Hall effect induces giant power factor in a topological semimetal
a The schematics of the separation process of electronic thermal conductivity \(\kappa _{xx}^e\) from the lattice thermal conductivity using \(\kappa _{xx}^{ph}\) the field dependence. b Separation of phonon and electronic contributions to the longitudinal thermal conductivity with inset displaying a computation (scattered points) of the phonon thermal conductivity from first principles. c Experimentally measured values of phonon modes (scattered points) of TaP along high-symmetry line Z-Γ-Σ taken by inelastic x-ray and neutron scattering with accompanying ab initio calculation (solid lines), displaying good agreement between ab initio calculations and experiment. d The electronic contribution of the thermal conductivity as a function of temperature at various fields. e The Lorenz number as a function of temperature at various fields. The black line indicates the theoretical value of the Wiedemann–Franz law.
