基于电子文丘里效应的电子雪崩放大器
Electron-avalanche amplifier based on the electronic Venturi effect
摘要：
在二维冷电子系统中研究了远离平衡态的弹道电子的散射。受激电子与简并费米液体之间的相互作用在纳米级区域中诱导正电荷，该正电荷对于局部热平衡下的扩散输运将是负电荷。在一个三端装置中，我们观察到电流的雪崩放大，导致类似于流体力学中文丘里效应的情况。使用随机相位近似的数值计算与我们的数据一致，并建议库仑相互作用的主导散射机制。
英文摘要：
Scattering of otherwise ballistic electrons far from equilibrium is investigated in a cold two-dimensional electron system. The interaction between excited electrons and the degenerate Fermi liquid induces a positive charge in a nanoscale region which would be negatively charged for diffusive transport at local thermal equilibrium. In a three-terminal device we observe avalanche amplification of electrical current, resulting in a situation comparable to the Venturi effect in hydrodynamics. Numerical calculations using a random phase approximation are in agreement with our data and suggest Coulomb interaction as the dominant scattering mechanism.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
