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  • Letter
  • Open Access

Magnetohydrodynamics and electron-electron interaction of massless Dirac fermions

D. A. Khudaiberdiev1,2, G. M. Gusev3, E. B. Olshanetsky1, Z. D. Kvon1,2, and N. N. Mikhailov1,2

  • 1Institute of Semiconductor Physics, Novosibirsk 630090, Russia
  • 2Novosibirsk State University, Novosibirsk 630090, Russia
  • 3Instituto de Física da Universidade de São Paulo, 135960-170, São Paulo, SP, Brazil

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Phys. Rev. Research 3, L032031 – Published 30 July, 2021

DOI: https://doi.org/10.1103/PhysRevResearch.3.L032031

Abstract

The magnetotransport properties of massless Dirac fermions in a gapless HgTe quantum well are investigated. In samples with narrow channels, a large negative magnetoresistance with a Lorentzian profile is observed, which is interpreted as a manifestation of electron viscosity due to an electron-electron interaction. A comparison of experiment with theory yields the shear stress relaxation time of the Dirac fermions caused by electron-electron scattering.

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Information

Phys. Rev. Research 3, L032031– Published 30 July, 2021
  • Received 7 April 2021
  • Revised 12 July 2021
  • Accepted 15 July 2021
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