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arXiv · 1810.06515

Vorticity induced negative nonlocal resistance in viscous two-dimensional electron system

A. D. Levin·G. M. Gusev·E. V. Levinson·Z. D. Kvon·A. K. Bakarov
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Abstract

We report non-local electrical measurements in a mesoscopic size two-dimensional (2D) electron gas in a GaAs quantum well in a hydrodynamic regime. Viscous electric flow is expected to be dominant when electron-electron collisions occur more often than the impurity or phonon scattering events. We observe a negative nonlocal resistance and attribute it to the formation of whirlpools in the electron flow. We use the different nonlocal transport geometries and compare the results with a theory demonstrating the significance of hydrodynamics in mesoscopic samples.

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A. D. Levin, G. M. Gusev, E. V. Levinson, Z. D. Kvon, A. K. Bakarov. 2018-10-15. Vorticity induced negative nonlocal resistance in viscous two-dimensional electron system. https://doi.org/10.1103/physrevb.97.245308

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