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0.7 anomaly and magnetotransport of disordered quantum wires

Europhysics letters, 2008-04, Vol.82 (2), p.27003-27003 (6) [Peer Reviewed Journal]

ISSN: 0295-5075 ;EISSN: 1286-4854 ;DOI: 10.1209/0295-5075/82/27003

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  • Title:
    0.7 anomaly and magnetotransport of disordered quantum wires
  • Author: Czapkiewicz, M ; Zagrajek, P ; Wróbel, J ; Grabecki, G ; Fronc, K ; Dietl, T ; Ohno, Y ; Matsuzaka, S ; Ohno, H
  • Subjects: 72.25.Dc ; 73.23.Ad ; 73.63.Nm
  • Is Part Of: Europhysics letters, 2008-04, Vol.82 (2), p.27003-27003 (6)
  • Description: 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.
  • Publisher: IOP Publishing
  • Language: English
  • Identifier: ISSN: 0295-5075
    EISSN: 1286-4854
    DOI: 10.1209/0295-5075/82/27003
  • Source: Alma/SFX Local Collection
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