Stokes flow around an obstacle in viscous two-dimensional electron liquid

G. M. Gusev, A. S. Jaroshevich, A. D. Levin, Z. D. Kvon, A. K. Bakarov

Результат исследования: Научные публикации в периодических изданияхстатья

Аннотация

The electronic analog of the Poiseuille flow is the transport in a narrow channel with disordered edges that scatter electrons in a diffuse way. In the hydrodynamic regime, the resistivity decreases with temperature, referred to as the Gurzhi effect, distinct from conventional Ohmic behaviour. We studied experimentally an electronic analog of the Stokes flow around a disc immersed in a two-dimensional viscous liquid. The circle obstacle results in an additive contribution to resistivity. If specular boundary conditions apply, it is no longer possible to detect Poiseuille type flow and the Gurzhi effect. However, in flow through a channel with a circular obstacle, the resistivity decreases with temperature. By tuning the temperature, we observed the transport signatures of the ballistic and hydrodynamic regimes on the length scale of disc size. Our experimental results confirm theoretical predictions.

Язык оригиналаанглийский
Номер статьи7860
Число страниц9
ЖурналScientific Reports
Том10
Номер выпуска1
DOI
СостояниеОпубликовано - 12 мая 2020

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