Transport Detection of Whirlpools in GaAs Electron Liquid
Dmitry A. Egorov, Dmitriy A. Pokhabov, Evgeny Yu. Zhdanov, Andrey A. Shevyrin, Askhat K. Bakarov + 1 more
TLDR
Researchers detected steady-state electron whirlpools in a GaAs 2D electron liquid via transport measurements, confirming hydrodynamic analogies.
Key contributions
- Detected large-scale, steady-state electron whirlpools in a GaAs 2D electron liquid.
- Observed whirlpools via negative four-terminal resistance in transport measurements.
- Confirmed the effect scales with Gurzhi length, quantitatively supporting the hydrodynamic analogy.
Why it matters
This paper provides strong experimental evidence for the hydrodynamic behavior of electron liquids, a concept previously challenging to confirm. It opens new avenues for understanding and manipulating electron flow in advanced electronic devices.
Original Abstract
We report the formation of large-scale steady-state whirlpools in a GaAs-based two-dimensional electron liquid and demonstrate them by straightforward transport measurements. A whirlpool forming inside a circular cavity adjoining a wide conducting channel appears as a negative four-terminal resistance over a broad range of temperatures and cavity sizes. The effect scales with the Gurzhi length, in quantitative accord with the hydrodynamic analogy. Obtained results firmly establish this analogy and probe the limits of its applicability.
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