Sondheimer oscillations as a probe of non-ohmic flow in WP₂ crystals.

ABSTRACT: As conductors in electronic applications shrink, microscopic conduction processes lead to strong deviations from Ohm's law. Depending on the length scales of momentum conserving (l_MC) and relaxing (l_MR) electron scattering, and the device size (d), current flows may shift from ohmic to ballistic to hydrodynamic regimes. So far, an in situ methodology to obtain these parameters within a micro/nanodevice is critically lacking. In this context, we exploit Sondheimer oscillations, semi-classical magnetoresistance oscillations due to helical electronic motion, as a method to obtain l_MR even when l_MR ≫ d. We extract l_MR from the Sondheimer amplitude in WP₂, at temperatures up to T ~ 40 K, a range most relevant for hydrodynamic tra

SUBMITTER: van Delft MR 

PROVIDER: S-EPMC8355329 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature