Discrete Charging in Polysilicon Gates of Single Electron Transistors
  Low temperature electron transport measurements of single electron transistors fabricated in advanced CMOS technology with polysilicon gates not only exhibit clear Coulomb blockade behavior but also show a large number of additional conductance fluctuations in the nonlinear regime. By comparison with simulations these features are quantitatively attributed to the effects of discretely charged islands in the polysilicon gates. 
Dharmraj Kotekar-Patil, Stefan Jauerneck, David Wharam, Dieter Kern,   Xavier Jehl, Romain Wacquez, M. Sanquer
cond-mat.mes-hall