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Many-body effects in a quasi-one-dimensional electron gas

Kumar, S; Thomas, KJ; Smith, LW; Pepper, M; Creeth, GL; Farrer, I; Ritchie, D; ... Griffiths, J; + view all (2014) Many-body effects in a quasi-one-dimensional electron gas. Physical Review B: Condensed Matter and Materials Physics , 90 , Article 201304(R). 10.1103/PhysRevB.90.201304. Green open access

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Abstract

We have investigated electron transport in a quasi-one dimensional (quasi-1D) electron gas as a function of the confinement potential. At a particular potential configuration, and electron concentration, the ground state of a 1D quantum wire splits into two rows to form an incipient Wigner lattice. It was found that application of a transverse magnetic field can transform a double-row electron configuration into a single-row due to magnetic enhancement of the confinement potential. The movements of the energy levels have been monitored under varying conditions of confinement potential and in-plane magnetic field. It is also shown that when the confinement is weak, electron occupation drives a reordering of the levels such that the normal ground state passes through the higher levels. The results show that the levels can be manipulated by utilising their different dependence on spatial confinement and electron concentration, thus enhancing the understanding of many body interactions in mesoscopic 1D quantum wires.

Type: Article
Title: Many-body effects in a quasi-one-dimensional electron gas
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevB.90.201304
Publisher version: http://dx.doi.org/10.1103/PhysRevB.90.201304
Language: English
Additional information: This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1453385
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