AI 中文总结
研究在高迁移率二维电子系统中通过文丘里形状器件观测强非线性输运，发现明显非线性电压响应与大的二极体性，结果与理论模型相符，为流体动力学框架在二维电子输运中的应用提供证据并开辟新探索途径。
AI 中文摘要
电子流体动力学研究为理解超清洁导体中的输运提供了有力框架，但实验证据大多局限于线性响应区域。本文报告了在高迁移率二维电子系统中对强非线性输运区域的直接观测。通过设计具有文丘里形状楔形几何结构的器件来增强对流非线性，发现电流 - 电压特性中有明显的非线性电压响应和大的二极体性。实验结果与理论模型定量相符，该模型将观测到的非线性归因于电子流体的对流加速，类似于伯努利效应。这些结果为流体动力学框架在二维电子输运中的适用性提供了有力证据，并为探索固态系统中的非线性和预湍流现象开辟了新途径。
英文摘要
The study of electron hydrodynamics provides a powerful framework for understanding transport in ultraclean conductors, yet experimental evidence has thus far been largely restricted to the linear-response regime. Here, we report the direct observation of a strongly nonlinear transport regime in a high-mobility two-dimensional electron system. By engineering devices with a Venturi-shaped wedge geometry specifically designed to enhance convective nonlinearities, we uncover a pronounced nonlinear voltage response and large diodicity in the current-voltage characteristics. Our experimental findings show quantitative agreement with a theoretical model that attributes the observed nonlinearity to the convective acceleration of the electron fluid, analogous to the Bernoulli effect. These results provide compelling evidence for the applicability of the hydrodynamic framework to two-dimensional electron transport and open new avenues for exploring nonlinear and preturbulent phenomena in solid-state systems.
Comments9 pages, 7 figures+supplemental material
Journal refPhysical Review B 114, 045305 (2026)
