The quantum interference effect transistor

Stafford, Charles; Cardamone, David; Mazumdar, S.

doi:10.1088/0957-4484/18/42/424014

Cited by 121 publications

(146 citation statements)

References 32 publications

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“…This model is especially proper to describe the electron transport in systems with two channels, such as ͓18͔ annulenes. 29,45 For the BP-N series with different intramolecular connections, the substitution position of the S anchoring groups has been fixed. The electron injects from a S-C bond and the following would be a double bond.…”

Section: The Electron Transport Pathwaymentioning

confidence: 99%

Nonequilibrium Green’s function study on the electronic structure and transportation behavior of the conjugated molecular junction: Terminal connections and intramolecular connections

Zhao

et al. 2009

The Journal of Chemical Physics

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In the recent density functional-based calculations, it was found that the conductivity of naphthalene molecular wires can be modulated by altering the linking position of the molecule to the electrode ͓D. Walter, D. Neuhauser, and R. Baer, Chem. Phys. 299, 139 ͑2004͔͒. A quantum interference model was proposed to interpret the observation. In this paper, we further studied the conductance of a series of conjugated molecules containing aromatic rings using density functional theory combined with nonequilibrium Green's function method. For polyacene systems with different terminal connections, the conductivity is dependent on the substitution position of anchoring groups even with similar electron transport distance. The conductance of trans-substitution can be ten times or more as large as that of the cis-substitution. However, for the biphenyl system with different intramolecular connections, adding more connections between two benzene rings does not change the junction conductance. All these results indicate that the junction conductance is strongly dependent on the particular electron transport pathway. The alternating double-single linkage is the most probable one, since others are impeded by the single bonds.

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Section: The Electron Transport Pathwaymentioning

confidence: 99%

Nonequilibrium Green’s function study on the electronic structure and transportation behavior of the conjugated molecular junction: Terminal connections and intramolecular connections

Zhao

et al. 2009

The Journal of Chemical Physics

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“…3,9 The tunneling current through a single benzene molecule was theoretically studied by DFT. 9 However, the influence of the strong correlation on the QI effect remains unclear due to the limitation of DFT.…”

Section: 12mentioning

confidence: 99%

Quantum interference and electron correlation in charge transport through triangular quantum dot molecules

Chen

Chang

Kuo

2015

Phys. Chem. Chem. Phys.

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We study the charge transport properties of triangular quantum dot molecule (TQDM) connected to metallic electrodes, taking into account all correlation functions and relevant charging states. The quantum interference (QI) effect of TQDM resulting from electron coherent tunneling between quantum dots is revealed and well interpreted by the long distance coherent tunneling mechanism. The spectra of electrical conductance of TQDM with charge filling from one to six electrons clearly depict the many-body and topological effects. The calculated charge stability diagram for conductance and total occupation numbers match well with the recent experimental measurements. We also demonstrate that the destructive QI effect on the tunneling current of TQDM is robust with respect to temperature variation, making the single electron QI transistor feasible at higher temperatures.

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“…30, 31, and 36). As a qualitative trend, the T-shaped 1, [31][32][33]36,37,65,66 or cyclic molecules 34,35,41,43,54,67 tend to have QI-related features in their transmission spectra.…”

Section: Introductionmentioning

confidence: 99%

“…27,28,31,[35][36][37][38][39][41][42][43]53,56,57 Associated with these mechanisms, many methods and techniques to understand and to predict the origin of the QI have been also studied. For the further development of single molecular devices employing QI effects, a systematic study of the relationship between electronic structure and the quantum interference is needed.…”

Section: Introductionmentioning

confidence: 99%

Quantum interference in thermoelectric molecular junctions: A toy model perspective

Nozaki¹,

Avdoshenko²,

Sevinçli³

et al. 2014

Journal of Applied Physics

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Quantum interference (QI) phenomena between electronic states in molecular circuits offer a new opportunity to design new types of molecular devices such as molecular sensors, interferometers, and thermoelectric devices. Controlling the QI effect is a key challenge for such applications. For the development of single molecular devices employing QI effects, a systematic study of the relationship between electronic structure and the quantum interference is needed. In order to uncover the essential topological requirements for the appearance of QI effects and the relationship between the QI-affected line shape of the transmission spectra and the electronic structures, we consider a homogeneous toy model where all on-site energies are identical and model four types of molecular junctions due to their topological connectivities. We systematically analyze their transmission spectra, density of states, and thermoelectric properties. Even without the degree of freedom for on-site energies an asymmetric Fano peak could be realized in the homogeneous systems with the cyclic configuration. We also calculate the thermoelectric properties of the model systems with and without fluctuation of on-site energies. Even under the fluctuation of the on-site energies, the finite thermoelectrics are preserved for the Fano resonance, thus cyclic configuration is promising for thermoelectric applications. This result also suggests the possibility to detect the cyclic configuration in the homogeneous systems and the presence of the QI features from thermoelectric measurements. V C 2014 AIP Publishing LLC. [http://dx

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The quantum interference effect transistor

Cited by 121 publications

References 32 publications

Nonequilibrium Green’s function study on the electronic structure and transportation behavior of the conjugated molecular junction: Terminal connections and intramolecular connections

Nonequilibrium Green’s function study on the electronic structure and transportation behavior of the conjugated molecular junction: Terminal connections and intramolecular connections

Quantum interference and electron correlation in charge transport through triangular quantum dot molecules

Quantum interference in thermoelectric molecular junctions: A toy model perspective

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