Resonant Tunneling through Quantum Wells: Physics and Device Applications

Capasso, Federico; Sen, S.; Cho, A.Y.; Gossard, A. C.; Spah, R.J.

doi:10.1016/b978-0-08-036237-3.50096-6

Cited by 1 publication

(2 citation statements)

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“…) x d ~/2 yields V ~n d im . This potential shifts the position of the molecular orbirtals, leading to a density-dependent transmission function as in equation (12) and resulting in NDC. In longer molecules, a similar situation may develop, with the difference that the image charge potential is not uniform along the molecule.…”

Section: Coulomb Interactions With Electrode Electrons Anothermentioning

confidence: 99%

“…The current maxima occur when the applied voltages to the barrier layers are such that the Fermi energy at the electrodes aligns with one of the states in the potential well (figure 1(b)), resulting in resonant tunneling which is manifested experimentally as peaks or humps in the tunneling current at voltages near the quasistationary states of the potential well. The NDC mechanism observed in Esaki's work established the theoretical basis and has been widely adopted in today's practical applications of bulk electronic devices, such as negative resistance oscillators, amplifiers and switching circuits [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Negative differential conductance in molecular junctions: an overview of experiment and theory

Dubi

2015

J. Phys.: Condens. Matter

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One of the ultimate goals of molecular electronics is to create technologies that will complement-and eventually supersede-Si-based microelectronics technologies. To reach this goal, electronic properties that mimic at least some of the electrical behaviors of today's semiconductor components must be recognized and characterized. An outstanding example for one such behavior is negative differential conductance (NDC), in which an increase in the voltage across the device terminals results in a decrease in the electric current passing through the device. This overview focuses on the NDC phenomena observed in metal-single molecule-metal molecular junctions, and is roughly divided into two parts. In the first part, the central experiments which demonstrate NDC in single-molecule junctions are critically reviewed, with emphasis on the main observations and their possible physical origins. The second part is devoted to the theory of NDC in single-molecule junctions, where simple models are employed to shed light on the different possible mechanisms leading to NDC.

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Section: Coulomb Interactions With Electrode Electrons Anothermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%