Kumar, V; Duo, Y; See, P; Griffiths, J P; Ritchie, D A; Farrer, I; Kumar, S (2025) Correlation effects mediated by disorders in one-dimensional channels. Physical Review B, 112 (3). 035404 ISSN 2469-9950

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Abstract

We report nonlinear transport in one-dimensional quantum wires formed in a GaAs/AlGaAs heterostructure. The two-terminal conductance characteristics were investigated under varying electron concentrations with and without a large in-plane magnetic field of 10 T. One important observation was that the 0.7-like feature was identified at higher-order subbands, specifically ∼1.6G0, ∼3.7G0, and ∼4.7G0. Additionally, our findings reveal the emergence of two conductance states appearing below e2/h under large dc bias voltage, where these states become more pronounced together with higher 0.7-like features, as electron concentration decreases, highlighting the influence of strong correlation effects in their formation. The weak Zeeman splitting in the ground state despite a large in-plane magnetic field of 10 T in low-density and weakly confined regime indicates disordered-induced correlation effects dominating the mechanism.

Item Type:	Article
Subjects:	Quantum Phenomena > Nanophysics
Divisions:	Quantum Technologies
Identification number/DOI:	10.1103/k8zm-v738
Last Modified:	27 Mar 2026 13:35
URI:	https://eprintspublications.npl.co.uk/id/eprint/10367