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Incipient Formation of an Electron Lattice in a Weakly Confined Quantum Wire

Hew, WK; Thomas, KJ; Pepper, M; Farrer, I; Anderson, D; Jones, GAC; Ritchie, DA; (2009) Incipient Formation of an Electron Lattice in a Weakly Confined Quantum Wire. PHYS REV LETT , 102 (5) , Article 056804. 10.1103/PhysRevLett.102.056804. Green open access

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Abstract

We study the low-temperature transport properties of 1D quantum wires as the confinement strength V-conf and the carrier density n(1D) are varied using a combination of split gates and a top gate in GaAs/AlGaAs heterostructures. At intermediate V-conf and n(1D), we observe a jump in conductance to 4e(2)/h, suggesting a double wire. On further reducing n(1D), plateau at 2e(2)/h returns. Our results show beginnings of the formation of an electron lattice in an interacting quasi-1D quantum wire. In the presence of an in-plane magnetic field, mixing of spin-aligned levels of the two wires gives rise to more complex states.

Type: Article
Title: Incipient Formation of an Electron Lattice in a Weakly Confined Quantum Wire
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.102.056804
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.102.056804
Language: English
Additional information: © 2009 The American Physical Society
Keywords: WIGNER CRYSTAL, GAS, HETEROJUNCTION, QUANTIZATION, CONDUCTANCE, TRANSITION, LIQUID
UCL classification: UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering
URI: http://discovery.ucl.ac.uk/id/eprint/1314517
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