Work

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

Year: 2018

Type: article

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.

Source: Nanoscale

DOI: 10.1039/c8nr06933f

Authors: Mauro Ballicchia, Josef Weinbub, Mihail Nedjalkov

Institutions: Marche Polytechnic University, TU Wien

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $1,254

Funders: Österreichische Nationalstiftung für Forschung, Technologie und Entwicklung, Austrian Science Fund, Christian Doppler Forschungsgesellschaft, Bundesministerium für Digitalisierung und Wirtschaftsstandort