Nonlinear Electron Current through a Short Molecular Wire

Петров, Е. С.; Hänggi, Peter

doi:10.1103/physrevlett.86.2862

Cited by 68 publications

(84 citation statements)

References 16 publications

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“…[28]. Similar effects appear for sequential charge hopping along a molecular wire [24,29]. The interplay of Coulomb interaction and wire population within an incoherent charge transport regime has been studied in detail in Ref.…”

Section: Model Set-up and Basic Equationsmentioning

confidence: 79%

“…[21] we could demonstrate that tunneling and the sequential route of charge transmission yield additive contributions to the total interelectrode current provided the population of the molecule by the transferred electrons remains small. If this is not the case the Coulomb interaction between the transferred electrons influences the charge transmission [24,[27][28][29][30][31][32][33][34]. In particular, this interaction causes specific transmission channels associated with the charge state of the molecule [22].…”

Section: Introductionmentioning

confidence: 99%

“…During the (elastic or inelastic) tunneling processes the molecular orbitals (MOs) are not populated by the transferred electrons. Their population is only caused by sequential transfer [4,[23][24][25][26], where the transferred electron jumps between the conduction band states of the lead and the molecular levels. In Ref.…”

Section: Introductionmentioning

confidence: 99%

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Kinetic control of the current through a single molecule

et al. 2006

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A unified description is put forward for the electron transmission through a molecule that is attached to two leads with the molecule being characterized by a single level to be populated by the transferred electrons. In deriving the expression for the current the Coulomb interaction is accounted for between the two extra electrons that may occupy the molecular level. The formation of two distinct transmission channels associated with the neutral and the singly charged molecule can directly be related to this interaction. Moreover, each transmission channel comprises a sequential as well as a direct (tunneling) pathway. The first pathway is realized via hopping transitions between the molecule and the neighboring electrodes. Just this inelastic kinetic process is responsible for the kinetic charging of the molecule. Then, the second pathway takes place against the background of kinetic molecular charging. In particular, it is demonstrated that hopping transmissions which are asymmetric with respect to the two electrodes cause a kinetic current rectification. The transient population of the molecule, realized by the transferred electrons, determines the rectification; the latter becomes rather large for resonant transmission.

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Section: Model Set-up and Basic Equationsmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

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Kinetic control of the current through a single molecule

et al. 2006

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“…The second case deals with the opposite limit in which Coulomb repulsion is so strong that at most one excess electron can be located on the molecule. Such theories have been developed in the context of conduction through coupled quantum dots [21][22][23] and for the incoherent transport through molecular wires [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Coherent charge transport through molecular wires: Influence of strong Coulomb repulsion

et al. 2006

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We derive a master equation for the electron transport through molecular wires in the limit of strong Coulomb repulsion. This approach is applied to two typical situations: First, we study transport through an open conduction channel for which we find that the current exhibits an ohmic-like behaviour. Second, we explore the transport properties of a bridged molecular wire, where the current decays exponentially as a function of the wire length. For both situations, we discuss the differences to the case of non-interacting electrons.

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“…The two approaches have the same essentials [9]. On the other hand, in the limit where the wire electrons lose their quantum coherence, the transport is dominated by incoherent hopping between neighbouring sites [10,11].…”

Section: Introductionmentioning

confidence: 95%

Controlling currents through molecular wires

Kohler

Lehmann

Hänggi

2003

Superlattices and Microstructures

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We investigate the possibility of controlling by means of external laser fields both the current through molecular wires and the corresponding noise properties. It is found that an appropriate off-resonant driving field reduces the coherent transport across the molecule resulting in a strong current suppression. The relative level of transport noise, characterized by a Fano factor, exhibits characteristic maxima and minima near regimes of current suppression. In a three-terminal configuration, the field allows one to steer the current selectively towards one terminal.

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Nonlinear Electron Current through a Short Molecular Wire

Cited by 68 publications

References 16 publications

Kinetic control of the current through a single molecule

Kinetic control of the current through a single molecule

Coherent charge transport through molecular wires: Influence of strong Coulomb repulsion

Controlling currents through molecular wires

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