Safonov S S, Savchenko A K, Bagrets D A, Jouravlev O N, Nazarov Y V, Linfield E H, Ritchie D A
School of Physics, University of Exeter, Stocker Road, Exeter, EX4 4QL, United Kingdom.
Phys Rev Lett. 2003 Sep 26;91(13):136801. doi: 10.1103/PhysRevLett.91.136801. Epub 2003 Sep 25.
In a variety of mesoscopic systems shot noise is seen to be suppressed in comparison with its Poisson value. In this work we observe a considerable enhancement of shot noise in the case of resonant tunneling via localized states. We present a model of correlated transport through two localized states which provides both a qualitative and a quantitative description of this effect.