Current-Driven Oscillations and Time-Dependent Transport in Nanojunctions

Kaun, Chao-Cheng; Seideman, Tamar

doi:10.1103/physrevlett.94.226801

Cited by 67 publications

(83 citation statements)

References 47 publications

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“…C 60 molecule, which is the most basic fullerene structure has been one of the most prominent candidates for molecular devices and has attracted much attention because of its unique geometry, mechanical and chemical robustness, extraordinary physical and chemical properties, and potential application in nanotechnology. Seideman and co-workers [7] studied the currentinduced oscillation behavior in Au-C 60 -Au heterojunctions using their theoretical methods. Recently, M. Sogo et al [8] indicated that the adsorbed C 60 molecule serves as an excellent mediator of metal wave function.…”

Section: Introductionmentioning

confidence: 99%

The electronic transport properties in C60 molecular devices with different contact distances

Zhai

Fang

et al. 2011

Physics Letters A

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Section: Introductionmentioning

confidence: 99%

The electronic transport properties in C60 molecular devices with different contact distances

Zhai

Fang

et al. 2011

Physics Letters A

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“…6,[10][11][12][13][14][15][16][17][18][19][20][21][22] The primary goal of these theoretical models and computational approaches is to describe the underlying process: inelastic electron tunneling (IET). While most of the tunneling current passing from the STM tip to a molecule-surface sample, or vice versa, is elastic, a few electrons can tunnel inelastically, particularly under certain system-specific conditions of voltage and current.…”

Section: Introductionmentioning

confidence: 99%

Chemistry at molecular junctions: Rotation and dissociation of O2 on the Ag(110) surface induced by a scanning tunneling microscope

Roy

Mújica

Ratner

2013

The Journal of Chemical Physics

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The scanning tunneling microscope (STM) is a fascinating tool used to perform chemical processes at the single-molecule level, including bond formation, bond breaking, and even chemical reactions. Hahn and Ho [J. Chem. Phys. 123, 214702 (2005)] performed controlled rotations and dissociations of single O2 molecules chemisorbed on the Ag(110) surface at precise bias voltages using STM. These threshold voltages were dependent on the direction of the bias voltage and the initial orientation of the chemisorbed molecule. They also observed an interesting voltage-direction-dependent and orientation-dependent pathway selectivity suggestive of mode-selective chemistry at molecular junctions, such that in one case the molecule underwent direct dissociation, whereas in the other case it underwent rotation-mediated dissociation. We present a detailed, first-principles-based theoretical study to investigate the mechanism of the tunneling-induced O2 dynamics, including the origin of the observed threshold voltages, the pathway dependence, and the rate of O2 dissociation. Results show a direct correspondence between the observed threshold voltage for a process and the activation energy for that process. The pathway selectivity arises from a competition between the voltage-modified barrier heights for rotation and dissociation, and the coupling strength of the tunneling electrons to the rotational and vibrational modes of the adsorbed molecule. Finally, we explore the "dipole" and "resonance" mechanisms of inelastic electron tunneling to elucidate the energy transfer between the tunneling electrons and chemisorbed O2.

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“…It is found by Kaun et al that resonance inelastic conduction in Au-C 60 -Au junctions can be used to transfer energy to a given mode of C 60 molecule, showing current-driven molecular oscillation phenomenon. It is expected that under electromagnetic field, this system can be used as nanoscale generator of alternating current [70]. Nano motor .…”

Section: Design Of Novel Devicesmentioning

confidence: 99%

Exploring at nanoscale from first principles

Yuan

Luo

et al. 2009

Front. Phys. China

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Systems at the nanoscale can exhibit distinctive and unexpected properties in electrical, magnetic, mechanical, and chemical aspects. Understanding these properties not only is of importance from the fundamental scientific view but also offers great opportunities for future applications. Theoretical calculations can provide important information to interpret, modify, and predict the novel properties of objects at the nanoscale and therefore play a significant role in the process of exploring the nano world. In this review, six different areas are briefly presented, namely, prediction of new stable structures, modification of properties (especially the electronic structures), design of novel devices for applications, the structures and catalytic effects of clusters, the mechanical and transport properties of gold nanowires, and improvement of materials for hydrogen storage. Based on these examples, we show what can be done and what can be found in the investigations of nanoscale systems with participation of theoretical calculations.

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Current-Driven Oscillations and Time-Dependent Transport in Nanojunctions

Cited by 67 publications

References 47 publications

The electronic transport properties in C60 molecular devices with different contact distances

The electronic transport properties in C60 molecular devices with different contact distances

Chemistry at molecular junctions: Rotation and dissociation of O2 on the Ag(110) surface induced by a scanning tunneling microscope

Exploring at nanoscale from first principles

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