Sondheimer oscillations as a probe of non-ohmic flow in WP2 crystals
Van Delft MR, Wang Y, Putzke C, Oswald J, Varnavides G, Garcia CAC, Guo C, Schmid H, Suess V, Borrmann H, Diaz J, Sun Y, Felser C, Gotsmann B, Narang P, Moll PJW (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 12
Article Number: 4799
Journal Issue: 1
DOI: 10.1038/s41467-021-25037-0
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 (lMC) and relaxing (lMR) 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 lMR even when lMR ≫ d. We extract lMR from the Sondheimer amplitude in WP2, at temperatures up to T ~ 40 K, a range most relevant for hydrodynamic transport phenomena. Our data on μm-sized devices are in excellent agreement with experimental reports of the bulk lMR and confirm that WP2 can be microfabricated without degradation. These results conclusively establish Sondheimer oscillations as a quantitative probe of lMR in micro-devices.
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How to cite
APA:
Van Delft, M.R., Wang, Y., Putzke, C., Oswald, J., Varnavides, G., Garcia, C.A.C.,... Moll, P.J.W. (2021). Sondheimer oscillations as a probe of non-ohmic flow in WP2 crystals. Nature Communications, 12(1). https://doi.org/10.1038/s41467-021-25037-0
MLA:
Van Delft, Maarten R., et al. "Sondheimer oscillations as a probe of non-ohmic flow in WP2 crystals." Nature Communications 12.1 (2021).
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