Gate controlling of quantum interference and direct observation of anti-resonances in single molecule charge transport

@article{Li2019GateCO,
  title={Gate controlling of quantum interference and direct observation of anti-resonances in single molecule charge transport},
  author={Yueqi Li and Marius Buerkle and Guangfeng Li and Ali Rostamian and Hui Wang and Zixiao Wang and David R Bowler and Tsuyoshi Miyazaki and Limin Xiang and Yoshihiro Asai and Gang Zhou and Nongjian Tao},
  journal={Nature Materials},
  year={2019},
  volume={18},
  pages={357-363}
}
Quantum interference can profoundly affect charge transport in single molecules, but experiments can usually measure only the conductance at the Fermi energy. Because, in general, the most pronounced features of the quantum interference are not located at the Fermi energy, it is highly desirable to probe charge transport in a broader energy range. Here, by means of electrochemical gating, we measure the conductance and map the transmission functions of single molecules at and around the Fermi… Expand

Figures and Topics from this paper

Destructive quantum interference in transport through molecules with electron-electron and electron-vibration interactions.
TLDR
It is shown that the transport through a molecular junction exhibiting interference effects can still be observed in the presence of molecular vibrations if Coulomb repulsion is taken into account, relevant for the development of quantum interference effect transistors based on molecular junctions. Expand
Electrode effects on the observability of destructive quantum interference in single-molecule junctions.
TLDR
First principles analysis of destructive quantum interference in graphene electrodes provides clear indications to guide the interpretation of experimental studies, which cannot be obtained from simple Hückel model calculations. Expand
Control of quantum interference in single-molecule junctions via Jahn-Teller distortion
  • Zhixin Chen, Lijue Chen, +10 authors Wenjing Hong
  • Materials Science
  • 2021
Summary Quantum interference offers a unique opportunity to tune the charge transport through molecular devices and materials at the phase-coherent scale. Herein, we propose a direct way to suppressExpand
Spin-sensitive charge oscillation in a single-molecule transistor
  • Peng-Chao Wang, Nan Nan, +4 authors Yong-Chen Xiong
  • Physics
  • Chinese Journal of Physics
  • 2021
Abstract A molecular spintronics device is considered as a highly promising candidate for the quantum hardware in the field of practical quantum information applications. Within this field, localExpand
Single-molecule quantum-transport phenomena in break junctions
Single-molecule junctions — devices in which a single molecule is electrically connected by two electrodes — enable the study of a broad range of quantum-transport phenomena even at room temperature.Expand
Turning the Tap: Conformational Control of Quantum Interference to Modulate Single Molecule Conductance.
TLDR
It is demonstrated that destructive quantum interference (DQI) in meta-substituted phenylene ethylene-type oligomers (m-OPE) can be tuned by changing the position and conformation of pendant methoxy (OMe) substituents around the central phenylene ring. Expand
Interplay between destructive quantum interference and symmetry-breaking phenomena in graphene quantum junctions
Quantum junctions with organic functional units exhibit antiresonances in the electronic transmission function, originating from completely destructive quantum interference (QI). We report aExpand
Quantum interference enhances rectification behavior of molecular devices.
TLDR
It is demonstrated that cross-conjugated molecules with electron-donating groups are efficient rectifiers with high conductance and found that the high rectification results from localizing the Highest Occupied Molecular Orbital (HOMO) at one end of the molecular device. Expand
Room-temperature quantum interference in single perovskite quantum dot junctions
TLDR
The atomic origin of the conductance features in the single perovskite quantum dot junctions are revealed, and direct evidence of the room-temperature quantum interference effects is presented. Expand
Mechanically Tunable Quantum Interference in Ferrocene-Based Single-Molecule Junctions.
TLDR
Measurements indicate that the conductance of the ferrocene derivative, which is suppressed by 2 orders of magnitude as compared to a fully conjugated analogue, can be modulated by altering the junction configuration, resulting in a conductance modulation that is seen experimentally. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 66 REFERENCES
Observation of quantum interference in molecular charge transport.
TLDR
The observation of destructive quantum interference in charge transport through two-terminal molecular junctions at room temperature is reported, and the degree of interference can be controlled by simple chemical modifications of the molecular wire. Expand
Mechanically controlled quantum interference in individual π-stacked dimers.
TLDR
It is shown that destructive interference can be turned on or off within the same molecular system by mechanically controlling its conformation, and it is demonstrated that it is possible to control the molecular conductance over more than one order of magnitude and with a sub-ångström resolution. Expand
Mechanically controlled quantum interference in graphene break junctions
TLDR
The fabrication of bowtie-shaped nanoconstrictions with mechanically controlled break junctions made from a single layer of graphene is demonstrated, providing direct experimental observation of a Fabry–Pérot-like interference of electron waves that are partially reflected and/or transmitted at the edges of the graphene bilayer overlap region. Expand
Electrochemical control of single-molecule conductance by Fermi-level tuning and conjugation switching.
TLDR
Electrochemical gating is used to reversibly tune the conductance of two different organic molecules, both containing anthraquinone (AQ) centers, over >1 order of magnitude. Expand
The relation between structure and quantum interference in single molecule junctions.
TLDR
It is demonstrated that QI in aromatic molecules is intimately related to the topology of the molecule's π system and a simple graphical scheme is established to predict the existence of QI-induced transmission antiresonances. Expand
Mapping the Transmission Functions of Single-Molecule Junctions.
TLDR
This work provides a new, experimentally simple route for exploring the fundamentals of charge transport at the nanoscale by measuring the transmission functions of molecular junctions in the coherent tunneling limit, over an energy range of 1.5 eV around the Fermi energy. Expand
Dissecting contact mechanics from quantum interference in single-molecule junctions of stilbene derivatives.
TLDR
These experiments provide the first direct quantitative study of the interplay between contact mechanics and the distinctively quantum mechanical nature of electronic transport in single-molecule junctions. Expand
A quantum circuit rule for interference effects in single-molecule electrical junctions.
TLDR
The single-molecule conductances of molecules of the form X-m-X (X-p-X) were found to satisfy the quantum circuit rule Gppp/Gpmp=Gmpm/Gmmm, demonstrating that the contribution to the conductance from the central ring is independent of the para versus meta nature of the anchor groups. Expand
Quantum interference through gated single-molecule junctions
Abstract We discuss the general form of the transmission spectrum through a molecular junction in terms of the Green function of the isolated molecule. By introducing a tight binding method, we areExpand
Orbital views of the electron transport in molecular devices.
TLDR
Qualitative predictions based on frontier orbital analysis about the site-dependent electron transport in naphthalene, phenanthrene, and anthracene are compared with density functional theory calculations for the molecular junctions of their dithiolate derivatives. Expand
...
1
2
3
4
5
...