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      Shot noise of coupled semiconductor quantum dots

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          Abstract

          The low-frequency shot noise properties of two electrostatically coupled semiconductor quantum dot states which are connected to emitter/collector contacts are studied. A master equation approach is used to analyze the bias voltage dependence of the Fano factor as a measure of temporal correlations in tunneling current caused by Pauli's exclusion principle and the Coulomb interaction. In particular, the influence of the Coulomb interaction on the shot noise behavior is discussed in detail and predictions for future experiments will be given. Furthermore, we propose a mechanism for negative differential conductance and investigate the related super-Poissonian shot noise.

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          Most cited references 20

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          Theory of Coulomb-blockade oscillations in the conductance of a quantum dot

           C Beenakker (1991)
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            Shot Noise in Mesoscopic Conductors

             ,   (2009)
            Theoretical and experimental work concerned with dynamic fluctuations has developed into a very active and fascinating subfield of mesoscopic physics. We present a review of this development focusing on shot noise in small electric conductors. Shot noise is a consequence of the quantization of charge. It can be used to obtain information on a system which is not available through conductance measurements. In particular, shot noise experiments can determine the charge and statistics of the quasiparticles relevant for transport, and reveal information on the potential profile and internal energy scales of mesoscopic systems. Shot noise is generally more sensitive to the effects of electron-electron interactions than the average conductance. We present a discussion based on the conceptually transparent scattering approach and on the classical Langevin and Boltzmann-Langevin methods; in addition a discussion of results which cannot be obtained by these methods is provided. We conclude the review by pointing out a number of unsolved problems and an outlook on the likely future development of the field.
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              Über spontane Stromschwankungen in verschiedenen Elektrizitätsleitern

               W. Schottky (1918)
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                Author and article information

                Journal
                03 March 2003
                Article
                10.1103/PhysRevB.68.125320
                cond-mat/0303025
                Custom metadata
                Phys. Rev. B 68, 125320 (2003)
                submitted to PRB
                cond-mat.mes-hall

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