Charge transport in a zinc–porphyrin single-molecule junction

Perrin, Mickael L.; Martin, Christian A.; Prins, Ferry; Shaikh, Ahson Jabbar; Eelkema, Rienk; Esch, Jan H. van; Ruitenbeek, J. M. van; Zant, Herre S. J. van der; Dulić, Diana

doi:10.3762/bjnano.2.77

Cited by 36 publications

(34 citation statements)

References 25 publications

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“…2e, where the gradual shift of the resonances becomes even more apparent. Due to the stability of the electrodes and the fine control over their spacing 32,33 , the energy levels can be shifted over several hundreds of meV by purely mechanical means.…”

Section: Curent-voltage Characteristicsmentioning

confidence: 99%

Large tunable image-charge effects in single-molecule junctions

et al. 2013

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The characteristics of molecular electronic devices are critically determined by metal-organic interfaces, which influence the arrangement of the orbital levels that participate in charge transport.Studies on self-assembled monolayers (SAMs) show (molecule-dependent) level shifts as well as transport-gap renormalization, suggesting that polarization effects in the metal substrate play a key role in the level alignment with respect to the metal's Fermi energy. Here, we provide direct evidence for an electrode-induced gap renormalization in single-molecule junctions. We study charge transport in single porphyrin-type molecules using electrically gateable break junctions.In this set-up, the position of the occupied and unoccupied levels can be followed in situ and with simultaneous mechanical control. When increasing the electrode separation, we observe a substantial increase in the transport gap with level shifts as high as several hundreds of meV for displacements of a fewÅngstroms. Analysis of this large and tunable gap renormalization with image-charge calculations based on atomic charges obtained from density functional theory confirms and clarifies the dominant role of image-charge effects in single-molecule junctions.

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Section: Curent-voltage Characteristicsmentioning

confidence: 99%

Large tunable image-charge effects in single-molecule junctions

et al. 2013

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“…In this 54 work, we study the charge transport through individual molecules 55 in a graphene-molecule-graphene junction. Porphyrin molecules provide a versatile platform for molec-59 ular device functionality, 19 and have been widely investigated as 60 such. Porphyrin molecules provide a versatile platform for molec-59 ular device functionality, 19 and have been widely investigated as 60 such.…”

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confidence: 99%

Graphene-porphyrin single-molecule transistors

et al. 2015

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We demonstrate a robust graphene-molecule-graphene transistor architecture. We observe remarkably reproducible single electron charging, which we attribute to insensitivity of the molecular junction to the atomic configuration of the graphene electrodes. The stability of the graphene electrodes allow for high-bias transport spectroscopy and the observation of multiple redox states at room-temperature.

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“…The effects of the electron-phonon coupling on the charge transport properties of single-molecule devices have been observed experimentally in a variety of molecular systems [9][10][11][12][13][14] and carbon nanotube (CNT) quantum dots [15][16][17][18][19] . These differ significantly from typical solidstate quantum dots in several respects.…”

Section: Introductionmentioning

confidence: 99%

Vibrational effects in charge transport through a molecular double quantum dot

et al. 2017

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Recent progress in the field of molecular electronics has revealed the fundamental importance of the coupling between the electronic degrees of freedom and specific vibrational modes. Considering the examples of a molecular dimer and a carbon nanotube double quantum dot, we here theoretically investigate transport through a two-site system that is strongly coupled to a single vibrational mode. Using a quantum master equation approach, we demonstrate that, depending on the relative positions of the two dots, electron-phonon interactions can lead to negative differential conductance and suppression of the current through the system. We also discuss the experimental relevance of the presented results and possible implementations of the studied system.

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Charge transport in a zinc–porphyrin single-molecule junction

Cited by 36 publications

References 25 publications

Large tunable image-charge effects in single-molecule junctions

Large tunable image-charge effects in single-molecule junctions

Graphene-porphyrin single-molecule transistors

Vibrational effects in charge transport through a molecular double quantum dot

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