We measure the thermal conductivity of solid and molten tungsten using steady state temperature differential radiometry. We demonstrate that the thermal conductivity can be well described by application of Wiedemann-Franz law to electrical resistivity data, thus suggesting the validity of Wiedemann-Franz law to capture the electronic thermal conductivity of metals in their molten phase. We further support this conclusion using ab initio molecular dynamics simulations with a machine-learned potential. Our results show that at these high temperatures, the vibrational contribution to thermal conductivity is negligible compared to the electronic component.
MILICH Milena;
SCHONFELD Hunter;
BOBORIDIS Konstantinos;
ROBBA Davide;
VLAHOVIC Luka;
KONINGS Rudy;
BRAUN Jeffrey L.;
GASKINS John T.;
BHATT Niraj;
GIRI Ashutosh;
HOPKINS Patrick;
2024-10-28
AMER PHYSICAL SOC
JRC136975
0031-9007 (online),
https://journals.aps.org/prl/references/10.1103/PhysRevLett.132.146303,
https://publications.jrc.ec.europa.eu/repository/handle/JRC136975,
10.1103/PhysRevLett.132.146303 (online),
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