منابع مشابه
Dynamics of a single-atom electron pump
Single-electron pumps based on isolated impurity atoms have recently been experimentally demonstrated. In these devices the Coulomb potential of an atom creates a localised electron state with a large charging energy and considerable orbital level spacings, enabling robust charge capturing processes. In contrast to the frequently used gate-defined quantum dot pumps, which experience a strongly ...
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We report on the electron analog of the single-photon gun. On-demand single-electron injection in a quantum conductor was obtained using a quantum dot connected to the conductor via a tunnel barrier. Electron emission was triggered by the application of a potential step that compensated for the dot-charging energy. Depending on the barrier transparency, the quantum emission time ranged from 0.1...
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Light elements such as alkali metal (lithium, sodium) or halogen (fluorine, chlorine) are present in various substances and indeed play significant roles in our life. Although atomic behaviours of these elements are often a key to resolve chemical or biological activities, they are hardly visible in transmission electron microscope because of their smaller scattering power and higher knock-on p...
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Spatial coherence and brightness of electron sources are two key factors for their application to electron interferometry and holography, electron diffraction, and electron microscopies. It has been long considered that a smaller source size would yield a higher brightness and a larger spatial coherence width. Several methods for producing single-atom tips (SATs) or nanotips were developed by d...
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The single electron transistor (SET) is a device in which a quantum dot (QD) is connected with source and drain contacts through small tunnel junctions. It also has a gate electrode through the "classical" capacitor that does not allow any tunneling of electrons. The operation of the SET is well characterized by the so-called Coulomb diamond and the Coulomb oscillations. Here we make use of Sin...
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ژورنال
عنوان ژورنال: e-Journal of Surface Science and Nanotechnology
سال: 2005
ISSN: 1348-0391
DOI: 10.1380/ejssnt.2005.412