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

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

2007-12-24

arxiv.org/abs/0712.3989v2

Eur. Phys. J. B 64, 67 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 3 figures

Scientific paper

10.1140/epjb/e2008-00272-0

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.

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