Negative viscosity and eddy flow of the imbalanced electron-hole liquid in graphene

Hong-Yi Xie and Alex Levchenko
Phys. Rev. B 99, 045434 – Published 23 January 2019

Abstract

We present a hydrodynamic theory for electron-hole magnetotransport in graphene incorporating carrier-population imbalance, energy, and momentum relaxation processes. We focus on the electric response and find that the carrier and energy imbalance relaxation processes strongly modify the shear viscosity, so that an effective viscosity can be negative in the vicinity of charge neutrality. We predict an emergent eddy flow pattern of swirling currents and explore its manifestation in nonlocal resistivity oscillations in a strip of graphene driven by a source current.

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  • Received 15 August 2018
  • Revised 27 November 2018

DOI:https://doi.org/10.1103/PhysRevB.99.045434

©2019 American Physical Society

Physics Subject Headings (PhySH)

  1. Physical Systems
  1. Techniques
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Hong-Yi Xie and Alex Levchenko

  • Department of Physics, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA

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Issue

Vol. 99, Iss. 4 — 15 January 2019

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