一个关键的理论里程碑出现在 1963 年，Radii Gurzhi 计算指出：如果电子主要彼此碰撞（守恒动量）而非与杂质碰撞，加热反而能提高导电性，这与典型金属中的情况相反；这种反直觉的温度趋势如今称为 Gurzhi effect。实验上，2004 年 graphene 的发现后进展加速，因其低杂质的晶体结构在适当条件下可让电子-电子散射占主导；2017 年的一项 graphene「阻塞点」实验报告电阻随温度升高而下降，与 Gurzhi 的预测一致。2022 年，Weizmann Institute 的团队使用一种具有图案化的、类 graphene 的材料（tungsten diselenide）并以磁场读出方式直接观测到回流与涡旋；同时，另一些 2022 年的工作也在相关系统中进一步强化了电子流体的图像。
最新的推动方向是迈向极端流速，使可压缩流体的现象浮现：在 2025 年，研究人员用 2 graphene layers 制作出一个 de Laval nozzle 形状的元件，并将电子加速到超过电子流体的有效「音速」（描述为几 100 kilometers per second），在下游产生可测的堆积，与冲击波一致。他们用仅有 nanometers 尺度的金属探针尖端来绘制此效应，该探针对微小的电场变化很敏感，因而提供了空间证据，而不只是整体电阻趋势。若能稳健且可扩展，电子流体力学可能带来新的器件概念（其中黏滞、涡旋与激波都重要）以及新的量子材料建模方式，但这种方法受限于严苛的洁净度、几何结构与散射条件要求，而多数日常导体并不满足。
Electrons are often said to “flow” in a current, but in most ordinary wires they do not move as a coherent, momentum-conserving fluid the way water does; instead, each electron largely scatters independently off vibrating atoms and impurities, producing a dispersive, energy-draining kind of transport. Since the 1960s, theorists have argued that in exceptionally clean materials and geometries, electron-electron collisions could dominate and make electrons behave collectively like a liquid. On February 11, 2026, a new set of results was highlighted as the most dramatic yet, including a fall 2025 demonstration of a shock-wave-like feature that is characteristic of fast fluid flow.
A key theoretical milestone came in 1963 when Radii Gurzhi calculated that if electrons mainly collide with each other (conserving momentum) rather than impurities, heating can increase conductivity, the opposite of what happens in typical metals; this counterintuitive temperature trend is now called the Gurzhi effect. Experimentally, progress accelerated after graphene’s discovery in 2004, because its low-impurity crystal structure lets electron-electron scattering dominate under the right conditions; in 2017, a graphene “choke point” experiment reported that resistance decreased as temperature increased, consistent with Gurzhi’s prediction. In 2022, a Weizmann Institute team used a patterned, graphene-like material (tungsten diselenide) and magnetic-field readout to directly observe backflow and vortices, while separate 2022 work further reinforced the electron-fluid picture in related systems.
The newest push is toward extreme flow speeds where compressible-fluid phenomena appear: in 2025, researchers shaped a device from 2 graphene layers into a de Laval nozzle and drove electrons fast enough to exceed the electron fluid’s effective “speed of sound,” described as a few 100 kilometers per second, producing a measurable downstream pileup consistent with a shock wave. They mapped the effect using a metallic probe tip only nanometers across, sensitive to tiny electric-field variations, providing spatial evidence rather than just bulk resistance trends. If robust and scalable, electron hydrodynamics could enable new device concepts (where viscosity, vortices, and shocks matter) and new ways to model quantum materials, but the approach is constrained by stringent cleanliness, geometry, and scattering requirements that are not met in most everyday conductors.