0.7 anomaly and magnetotransport of disordered quantum wires

M. Czapkiewicz, P. Zagrajek, J. Wróbel, G. Grabecki, K. Fronc, T. Dietl, Y. Ohno, S. Matsuzaka, H. Ohno

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

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.

Original languageEnglish
Article number27003
JournalEPL
Volume82
Issue number2
DOIs
Publication statusPublished - 2008 Apr 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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