Evaluating size effects on the thermal conductivity and electron-phonon scattering rates of copper thin films for experimental validation of Matthiessen's rule.

ABSTRACT: As metallic nanostructures shrink towards the size of the electronic mean free path, thermal conductivity decreases due to increased electronic scattering rates. Matthiessen's rule is commonly applied to assess changes in electron scattering rates, although this rule has not been validated experimentally at typical operating temperatures for most of the electronic systems (e.g., near room temperature). In this study, we experimentally evaluate the validity of Matthiessen's rule in determining the thermal conductivity of thin metal films by measuring the in-plane thermal conductivity and electronic scattering rates of copper (Cu) films with varying thicknesses (27 nm - 5 µm), microstructures, and grain boundary segregation. Comparing total electron scattering rates measured with infrared el

SUBMITTER: Islam MR 

PROVIDER: S-EPMC11502751 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature