Molecular Electronic Devices

Chen, Juliana; Reed, Mark A.; Dirk, Shawn M.; Price, David W.; Rawlett, Adam M.; Tour, James M.; Grubisha, Desirée S.; Bennett, D.

doi:10.1016/b978-012507060-7/50023-4

Cited by 32 publications

(46 citation statements)

References 110 publications

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“…[2][3][4] Rectification and negative differential resistance could already be demonstrated on the nanoscale. 3 However, mechanical, electrical or electromechanical switching devices and transistors still include components of mesoscopic dimensions.…”

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confidence: 99%

“…In addition, it is demonstrated that the conductance of such molecular devices strongly depends on the structural relaxation of the junction. In the Landauer approach, the conductance of the system is related to an independent-electron elastic scattering problem, with the transmission function T(E) at the Fermi energy E F determining the two-terminal, linear-response conductance in the zero temperature limit gϭ 2e 2 h T͑E F ͒. ͑1͒…”

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confidence: 99%

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Theory of an all-carbon molecular switch

et al. 2002

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We study electron transport across a carbon molecular junction consisting of a C 60 molecule sandwiched between two semi-infinite metallic carbon nanotubes. It is shown that the Landauer conductance of this carbon hybrid system can be tuned within orders of magnitude not only by varying the tube-C 60 distance, but more importantly at fixed distances by ͑i͒ changing the orientation of the Buckminsterfullerene or ͑ii͒ rotating one of the tubes around its cylinder axis. Furthermore, it is explicitly shown that structural relaxation determines qualitatively the transmission spectrum of such devices.

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confidence: 99%

Theory of an all-carbon molecular switch

et al. 2002

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“…1 Some molecules can operate as diodes, 2 Coulomb blockade structures, 3 or switching devices with high negative differential resistance at room temperature. 4,5 Transistorlike behavior in molecular three-terminal devices ͑molecular transistors͒ has been demonstrated in a single C 60 fullerene connected to gold electrodes, 6 in organic self-assembled monolayers, 7 and in single-and multiwalled carbon nanotubes. 8,9 The source-drain current in these systems ͑three-terminal devices͒ is controlled by a gate voltage.…”

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confidence: 99%

“…14 Some transport properties of molecular devices ͑e.g., their temperature dependence͒ was also found to be intrinsically different from the properties of semiconductor nanostructures. 5,14 A molecular three-terminal device that could be an alternative to a metal-oxide-semiconductor transistor should exhibit characteristics such as amplification, signal-to-noise ratio, etc. Theoretical calculations for a benzene-1,4-dithiolate molecule with a third capacitive terminal ͑gate͒ have shown that some of these characteristics can, in principle, be realized.…”

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Transport in molecular transistors: Symmetry effects and nonlinearities

2002

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We report first-principles calculations of the current-voltage and current-gate-field characteristics of model molecular transistors to explore the factors that control current amplification and other properties. We show that both the position and amplitude of resonant peaks are modified by the use of substituents that affect the symmetry and dipole moments of the molecules, and allow a linear versus nonlinear Stark effect. In addition, strong nonlinearities arise at large source-drain currents.

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“…In this respect molecular electronics provides the opposite approach. 3 Here the basic idea is to use molecular systems for electronic applications and conventional electronic devices such as transistors, 4 negative differential resistors, 5 and rectifiers 6 have already been produced at the molecular level.…”

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confidence: 99%

Contact-induced spin polarization in carbon nanotubes

Ferreira

Sanvito

2004

Phys. Rev. B

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Motivated by the possibility of combining spintronics with molecular structures, we investigate the conditions for the appearance of spin polarization in low-dimensional tubular systems by contacting them to a magnetic substrate. We derive a set of general expressions describing the charge transfer between the tube and the substrate and the relative energy costs. The mean-field solution of the general expressions provides an insightful formula for the induced spin polarization. Using a tight-binding model for the electronic structure we are able to estimate the magnitude and the stability of the induced moment. This indicates that a significant magnetic moment in carbon nanotubes can be observed.

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Molecular Electronic Devices

Cited by 32 publications

References 110 publications

Theory of an all-carbon molecular switch

Theory of an all-carbon molecular switch

Transport in molecular transistors: Symmetry effects and nonlinearities

Contact-induced spin polarization in carbon nanotubes

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