2016/06/29 by Changdong Wei, Nikolas Antolin, Wei, Changdong +7
Earth and Planetary Sciences · Materials Science · #Advanced Thermoelectric Materials and Devices #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Thermal properties of materials #nanoparticles nucleation surface interactions
paper · pdf · doi:10.48550/arxiv.1606.09287
openalex publication_date 2016/06/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We extended and corrected Mott's two-band model for the composition-dependence of thermal and electrical conductivity in binary metal alloys based on high-throughput time-domain thermoreflectance (TDTR) measurements on diffusion multiples and scatterer-density calculations from first principles. Examining PdAg, PtRh, AuAg, AuCu, PdCu, PdPt, and NiRh binary alloys, we found that the nature of the two dominant scatterer-bands considered in the Mott model changes with the alloys, and should be interpreted as a combination of the dominant element-specific s- and/or d-orbitals. Using calculated orbital and element-resolved density-of-states values calculated with density functional theory as input, we determined the correct orbital mix that dominates electron scattering for all examined alloys and find excellent agreement between fitted models and experiments. The proposed description of the composition dependence of the resistivity can be readily implemented into the CALPHAD framework.