Electron-avalanche amplifier based on the electronic Venturi effect
Mesoscale and Nanoscale Physics
2010-10-27 v4
Abstract
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.
Cite
@article{arxiv.1001.5201,
title = {Electron-avalanche amplifier based on the electronic Venturi effect},
author = {D. Taubert and G. J. Schinner and H. P. Tranitz and W. Wegscheider and C. Tomaras and S. Kehrein and S. Ludwig},
journal= {arXiv preprint arXiv:1001.5201},
year = {2010}
}
Comments
4 pages, 4 figures