We compare the electronic heat capacity and thermal conductivity of non-magnetic UN and ThN against ThC. We used Quantum Espresso and EPW codes based on density-functional theory to evaluate the electron density of states, the electronic heat capacity coefficient, the electron phonon coupling strength, the averaged over the temperature range 300 K – 1000 K, number of mobility electrons, and the electronic heat conductivity [1-3]. We confirmed that while the electronic heat capacity coefficient was linearly dependent on the electron density of states at Fermi energy, such a simple relation could not be used to determine the electronic heat conductivity, which was the highest for ThN.
1) B. Szpunar, J.I. Ranasinghe, L. Malakkal, and J.A. Szpunar, J. Alloys Compd., 879 (2021) 160467;
2) B. Szpunar, J.I. Ranasinghe, et al, J. Phys. and Chem. Solids, 165 (2022) 110647;
3) B. Szpunar, Nucl. Mater. Energy, 32 (2022) 101212, pp. 5.