Thermal and electrical signatures of a hydrodynamic electron fluid in tungsten diphosphide
| Autor: | Vicky Süβ, Ute Drechsler, Johannes Gooth, Yan Sun, Claudia Felser, Fabian Menges, Nitesh Kumar, Chandra Shekhar, Bernd Gotsmann, Robert Zierold |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Phonon Science General Physics and Astronomy Weyl semimetal chemistry.chemical_element 02 engineering and technology Electron Tungsten 01 natural sciences General Biochemistry Genetics and Molecular Biology Article Electrical resistivity and conductivity 0103 physical sciences Thermal 010306 general physics lcsh:Science Multidisciplinary Condensed matter physics General Chemistry Dissipation 021001 nanoscience & nanotechnology Electron transport chain chemistry lcsh:Q 0210 nano-technology |
| Zdroj: | Nature Communications, Vol 9, Iss 1, Pp 1-8 (2018) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | In stark contrast to ordinary metals, in materials in which electrons strongly interact with each other or with phonons, electron transport is thought to resemble the flow of viscous fluids. Despite their differences, it is predicted that transport in both conventional and correlated materials is fundamentally limited by the uncertainty principle applied to energy dissipation. Here we report the observation of experimental signatures of hydrodynamic electron flow in the Weyl semimetal tungsten diphosphide. Using thermal and magneto-electric transport experiments, we find indications of the transition from a conventional metallic state at higher temperatures to a hydrodynamic electron fluid below 20 K. The hydrodynamic regime is characterized by a viscosity-induced dependence of the electrical resistivity on the sample width and by a strong violation of the Wiedemann–Franz law. Following the uncertainty principle, both electrical and thermal transport are bound by the quantum indeterminacy, independent of the underlying transport regime. Advances in the fabrication of low-disorder metallic materials have made it possible to reach the hydrodynamic regime of electronic transport. Here the authors investigate a hydrodynamic electron fluid in tungsten diphosphide and find that both electrical and thermal transport are limited by the quantum indeterminacy. |
| Databáze: | OpenAIRE |
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