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Electron evolution around a repulsive dopant in a quantum wire: coherence effects

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Abstract

We present an analysis of the quantum processes involved in the electron evolution around a repulsive dopant in a quantum wire. The quantum electron behavior has been studied by using a Wigner function approach. The Wigner phase space description allows the treatment of both classical and quantum evolution in the same framework, enabling ease of highlighting the effects of coherence. While the former is governed by a force, which is the first derivative of the dopant potential, the latter accounts for the entire potential, namely all derivatives in the corresponding Taylor expansion take part in the interaction. This gives rise to processes of tunneling and non-locality of the action of the potential. The complicated interplay of these quantum effects with the boundary conditions associated with the wire affects the physical observables like electron and current densities and in particular can give rise to an increase of the total current.

Graphical abstract: Electron evolution around a repulsive dopant in a quantum wire: coherence effects

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Publication details

The article was received on 27 Aug 2018, accepted on 13 Nov 2018 and first published on 16 Nov 2018


Article type: Paper
DOI: 10.1039/C8NR06933F
Citation: Nanoscale, 2018, Advance Article
  • Open access: Creative Commons BY license
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    Electron evolution around a repulsive dopant in a quantum wire: coherence effects

    M. Ballicchia, J. Weinbub and M. Nedjalkov, Nanoscale, 2018, Advance Article , DOI: 10.1039/C8NR06933F

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