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Suppression of weak antilocalization in GaxIn1xAsInP narrow quantum wires

Th. Schäpers, V. A. Guzenko, M. G. Pala, U. Zülicke, M. Governale, J. Knobbe, and H. Hardtdegen
Phys. Rev. B 74, 081301(R) – Published 2 August 2006

Abstract

The magnetoconductivity of GaxIn1xAsInP quantum wires with widths in the range of 1220250nm was investigated. The finite zero-field spin splitting in our samples gives rise to spin relaxation and weak antilocalization in wide wires. In contrast, for the narrow wires, only weak-localization behavior is seen even though the zero-field spin splitting is independent of wire width. The observed renormalization of the spin-relaxation length due to purely geometrical effects can be described quantitatively using a model where the effect of spin precession is represented by spin-dependent pseudomagnetic fluxes, and by exact numerical transport calculations.

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  • Received 21 June 2006

DOI:https://doi.org/10.1103/PhysRevB.74.081301

©2006 American Physical Society

Authors & Affiliations

Th. Schäpers1, V. A. Guzenko1, M. G. Pala2, U. Zülicke3, M. Governale4, J. Knobbe1, and H. Hardtdegen1

  • 1Institute for Bio- and Nanosystems (IBN-1) and Virtual Institute of Spin Electronics (VISel), Research Centre Jülich GmbH, 52425 Jülich, Germany
  • 2IMEP-MINATEC (UMR CNRS-INPG-UJF 5130), 23 rue des Martyrs, Boîte Postale 257, 38016 Grenoble, France
  • 3Institute of Fundamental Sciences and MacDiarmid Institute for Advanced Materials and Nanotechnology, Massey University, Private Bag 11 222, Palmerston North, New Zealand
  • 4Institut für Theoretische Physik III, Ruhr-Universität Bochum, 44780 Bochum, Germany

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Issue

Vol. 74, Iss. 8 — 15 August 2006

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