Physics – Condensed Matter – Materials Science
Scientific paper
2007-08-14
Dans European Nano Systems Worshop - ENS 2005, Paris : France (2005)
Physics
Condensed Matter
Materials Science
Submitted on behalf of TIMA Editions (http://irevues.inist.fr/tima-editions)
Scientific paper
Investigation of electrical conduction in polysilicon nanowires (polySiNW) with nanograins (5 to 20nm), based on Monte Carlo (MC) simulations and electrical measurements from 4K to 300K are presented. Some irregular Coulomb Oscillations (CO) are observed at temperatures lower than 200K showing several period widths due to the random distribution in grain size (5-20nm). A remarkable result consists in more effective oscillations observed at intermediate range of temperatures (between 25K and 150K) and high drain voltages. The temperature dependence of COs is explained by the fact that in a multiple asymmetric dot system at low temperature, COs are observed not at the lowest but at an intermediate temperature range, whereas the drain voltage dependence is due to an enhanced non-resonant tunneling. MC simulations have confirmed experimental observations.
Bouvet D.
Ecoffey S.
Ionescu Adrian Mihai
Mahapatra Swapna
Pott V.
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