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

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

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12 Citations (Scopus)

Abstract

We report nonlocal 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.

Original languageEnglish
Article number245308
Number of pages7
JournalPhysical Review B
Volume95
Issue number24
DOIs
Publication statusPublished - 25 Jun 2018

Keywords

  • PHONON-SCATTERING
  • HIGH-MOBILITY
  • HETEROJUNCTIONS
  • MECHANISM
  • GRAPHENE
  • FLOW

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