0.7-anomaly and magnetotransport of disordered quantum wires

Abstract

The unexpected "0.7" plateau of conductance quantisation is usually observed for ballistic one-dimensional devices. In this work we study a quasi-ballistic quantum wire, for which the disorder induced backscattering reduces the conductance quantisation steps. We find that the transmission probability resonances coexist with the anomalous plateau. The studies of these resonances as a function of the in-plane magnetic field and electron density point to the presence of spin polarisation at low carrier concentrations and constitute a method for the determination of the effective g-factor suitable for disordered quantum wires.

arXiv comment4 pages, 6 figures

References in corpus (9)

• Possible Spin Polarization in a One-Dimensional Electron Gas
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Cited by in corpus (3)

• What lurks below the last plateau: Experimental studies of the 0.7 x 2e^2/h conductance anomaly in one-dimensional systems
• Non-Kondo zero-bias anomaly in quantum wires
• Evidence for Charging Effects in CdTe/CdMgTe Quantum Point Contacts