Eur. Phys. J. B 64, 67-72 (2008)
https://doi.org/10.1140/epjb/e2008-00272-0

Shot noise in a quantum dot coupled to non-magnetic leads: effects of Coulomb interaction

¹ Department of Physics and Surface Physics Laboratory (National Key Laboratory), Fudan University, Shanghai, 200433, P.R. China
² Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong, P.R. China

Corresponding author: ^a shihuaouyang@gmail.com

Received: 31 March 2008
Revised: 29 May 2008
Published online: 9 July 2008

Abstract

We study electron transport through a quantum dot, connected to non-magnetic leads, in a magnetic field. A super-Poissonian electron noise due to the effects of both interacting localized states and dynamic channel blockade is found when the Coulomb blockade is partially lifted. This is sharp contrast to the sub-Poissonian shot noise found in the previous studies for a large bias voltage, where the Coulomb blockade is completely lifted. Moreover, we show that the super-Poissonian shot noise can be suppressed by applying an electron spin resonance (ESR) driving field. For a sufficiently strong ESR driving field strength, the super-Poissonian shot noise will change to be sub-Poissonian.