Enhanced Shot Noise in Tunneling through a Stack of Coupled Quantum Dots
  We have investigated the noise properties of the tunneling current through vertically coupled self-assembled InAs quantum dots. We observe super-Poissonian shot noise at low temperatures. For increased temperature this effect is suppressed. The super-Poissonian noise is explained by capacitive coupling between different stacks of quantum dots. 
P. Barthold, F. Hohls, N. Maire, K. Pierz, R.J. Haug