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arXiv · 0907.1634

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

W. K. Hew·K. J. Thomas·M. Pepper·I. Farrer·D. Anderson·G. A. C. Jones·D. A. Ritchie
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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.

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W. K. Hew, K. J. Thomas, M. Pepper, I. Farrer, D. Anderson, G. A. C. Jones, D. A. Ritchie. 2009-07-09. Incipient Formation of an Electron Lattice in a Weakly-Confined Quantum Wire. https://doi.org/10.1103/physrevlett.102.056804

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