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Electron aspirator using electron-electron scattering in nanoscale silicon.

Abstract：

:Current enhancement without increasing the input power is a critical issue to be pursued for electronic circuits. However, drivability of metal-oxide-semiconductor (MOS) transistors is limited by the source-injection current, and electrons that have passed through the source unavoidably waste their momentum to the phonon bath. Here, we propose the Si electron-aspirator, a nanometer-scaled MOS device with a T-shaped branch, to go beyond this limit. The device utilizes the hydrodynamic nature of electrons due to the electron-electron scattering, by which the injected hot electrons transfer their momentum to cold electrons before they relax with the phonon bath. This momentum transfer induces an electron flow from the grounded side terminal without additional power sources. The operation is demonstrated by observing the output-current enhancement by a factor of about 3 at 8 K, which reveals that the electron-electron scattering can govern the electron transport in nanometer-scaled MOS devices, and increase their effective drivability.

journal_name

Nat Commun

journal_title

Nature communications

authors

Firdaus H,Watanabe T,Hori M,Moraru D,Takahashi Y,Fujiwara A,Ono Y

doi

10.1038/s41467-018-07278-8

subject

Has Abstract

pub_date

2018-12-17 00:00:00

pages

4813

issue

1

issn

2041-1723

pii

10.1038/s41467-018-07278-8

journal_volume

9

pub_type

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