Abstract:
:Flicker or 1/f noise in metal-oxide-semiconductor field-effect transistors (MOSFETs) has been identified as the main source of noise at low frequency. It often originates from an ensemble of a huge number of charges becoming trapped and de-trapped. However, as a deviation from the well-known model of 1/f noise is observed for nanoscale MOSFETs, a new model is required. Here, we report the observation of one-by-one trap activation controlled by the gate voltage in a nanowire MOSFET and propose a new low-frequency-noise theory for nanoscale FETs. We show that the Coulomb repulsion between electronically charged trap sites prevents the activation of several traps simultaneously. This effect induces a noise reduction of more than one order of magnitude. It decreases when the electron density in the channel is increased due to the electrical screening of traps. These findings are technologically useful for any FET with a short and narrow channel.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Clément N,Nishiguchi K,Fujiwara A,Vuillaume Ddoi
10.1038/ncomms1092subject
Has Abstractpub_date
2010-10-19 00:00:00pages
92issn
2041-1723pii
ncomms1092journal_volume
1pub_type
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