Tailoring local chemical fluctuation of high-entropy structures in thermoelectric materials.

ABSTRACT: In high-entropy materials, local chemical fluctuation from multiple elements inhabiting the same crystallographic site plays a crucial role in their unique properties. Using atomic-resolution chemical mapping, we identified the respective contributions of different element characteristics on the local chemical fluctuation of high-entropy structures in thermoelectric materials. Electronegativity and mass had a comparable influence on the fluctuations of constituent elements, while the radius made a slight contribution. The local chemical fluctuation was further tailored by selecting specific elements to induce large lattice distortion and strong strain fluctuation to lower lattice thermal conductivity independent of increased entropy. The chemical bond fluctuation induced by the electronega

SUBMITTER: Wang W 

PROVIDER: S-EPMC11192076 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature