Elastic response of the electron fluid in intrinsic graphene: The collisionless regime

2018/08/31 by Julia M. Link, Daniel E. Sheehy, Boris N. Narozhny +2
Materials Science · Physics and Astronomy · #Condensed matter physics #Coulomb #Electron #Graphene #Graphene research and applications #Omega #Physics #Quantum and electron transport phenomena #Quantum mechanics #Quantum, superfluid, helium dynamics #Viscosity #cond-mat.mes-hall #cond-mat.mtrl-sci #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.98.195103

published as Phys. Rev. B 98, 195103 (2018) · 18 pages, 5 figures

openalex publication_date 2018/11/02 · arxiv created 2018/11/03 · arxiv updated 2018/11/06 · openalex created_date 2018/11/09 · openalex updated_date 2026/08/06

Abstract

The frequency-dependent dynamic motion of electrons in graphene is similar to that of an elastic medium, exhibiting viscous flow. Here, the authors demonstrate that, in intrinsic graphene, the dynamical viscosity and the dynamical elastic constants are linked and control the nonlocal energy flow of the system. By computing graphene's dynamic viscosity, the authors show that contributions due to single-particle motion -- as in dilute gases -- are comparable in magnitude to contributions due to many-body effects, similar to viscous substances like honey.

Citations

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