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

van Delft, M. R., Wang, Y., Putzke, C., Oswald, J., Varnavides, G., Garcia, C. A. C., et al. (2021). Sondheimer oscillations as a probe of non-ohmic flow in WP2 crystals. Nature Communications, 12(1): 4799, pp. 1-9. doi:10.1038/s41467-021-25037-0.

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 Creators:
van Delft, Maarten R.1, Author
Wang, Yaxian1, Author
Putzke, Carsten1, Author
Oswald, Jacopo1, Author
Varnavides, Georgios1, Author
Garcia, Christina A. C.1, Author
Guo, Chunyu1, Author
Schmid, Heinz1, Author
Süss, Vicky2, Author              
Borrmann, Horst3, Author              
Diaz, Jonas1, Author
Sun, Yan2, Author              
Felser, Claudia4, Author              
Gotsmann, Bernd1, Author
Narang, Prineha1, Author
Moll, P.J.W.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3Horst Borrmann, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863410              
4Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 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. © 2021, The Author(s).

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Language(s): eng - English
 Dates: 2021-08-102021-08-10
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: DOI: 10.1038/s41467-021-25037-0
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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 12 (1) Sequence Number: 4799 Start / End Page: 1 - 9 Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723