2020/08/11 by Johannes Geurs, Geurs, Johannes, Youngwook Kim +10 · 14 citations
Engineering · Physics and Astronomy · #Electrohydrodynamics and Fluid Dynamics #FOS: Physical sciences #Flow (mathematics) #Graphene #Materials science #Mechanics #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Microfluidic and Capillary Electrophoresis Applications #Nanopore and Nanochannel Transport Studies #Nanotechnology #Physics #Quantum mechanics #Rectification #Strongly Correlated Electrons (cond-mat.str-el) #Voltage #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.2008.04862
published in arXiv (Cornell University) (Cornell University) · 7 pages, 4 figures + supplement. Submitted
arxiv created 2020/08/11 · openalex publication_date 2020/08/11 · arxiv updated 2020/08/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Systems in which interparticle interactions prevail can be described by hydrodynamics. This regime is typically difficult to access in the solid state for electrons. However, the high purity of encapsulated graphene combined with its advantageous phonon properties make it possible, and hydrodynamic corrections to the conductivity of graphene have been observed. Examples include electron whirlpools, enhanced flow through constrictions as well as a Poiseuille flow profile. An electronic device relying specifically on viscous behaviour and acting as a viscometer has however been lacking. Here, we implement the analogue of the Tesla valve. It exhibits nonreciprocal transport and can be regarded as an electronic viscous diode. Rectification occurs at carrier densities and temperatures consistent with the hydrodynamic regime, and disappears both in the ballistic and diffusive transport regimes. In a device in which the electrons are exposed to a Moiré superlattice, the Lifshitz transition when crossing the Van Hove singularity is observed in the rectifying behaviour.