Quantum dragon solutions for electron transport through nanostructures based on rectangular graphs

Electron transport through nanodevices of atoms in a single-layer rectangular arrangement with free (open) boundary conditions parallel to the direction of the current flow is studied within the single-band tight binding model. The Landauer formula gives the electrical conductance to be a function o...

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Bibliographic Details
Published in:Journal of physics communications 2018-11, Vol.2 (11), p.115019
Main Authors: Inkoom, G, Novotny, M A
Format: Article
Language:English
Subjects:
electron transport
nanodevices
quantum dragons
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Summary:Electron transport through nanodevices of atoms in a single-layer rectangular arrangement with free (open) boundary conditions parallel to the direction of the current flow is studied within the single-band tight binding model. The Landauer formula gives the electrical conductance to be a function of the electron transmission probability,  ( E ) , as a function of the energy E of the incoming electron. A quantum dragon nanodevice is one which has a perfectly conducting channel, namely  ( E ) = 1 for all energies which are transmitted by the external leads even though there may be arbitrarily strong electron scattering. The rectangular single-layer systems are shown to be able to be quantum dragon devices, both for uniform leads and for dimerized leads. The quantum dragon condition requires appropriate lead-device connections and correlated randomness in the device.
ISSN:2399-6528
2399-6528
DOI:10.1088/2399-6528/aaef4f