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The European Physical Journal B

, Volume 64, Issue 1, pp 67–72 | Cite as

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

Article

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.

PACS

73.21.La Quantum dots 73.23.-b Electronic transport in mesoscopic systems 

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  1. 1.Department of Physics and Surface Physics Laboratory (National Key Laboratory)Fudan UniversityShanghaiP.R. China
  2. 2.Department of Applied PhysicsHong Kong Polytechnic UniversityHong KongP.R. China

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