Critical Resistance in the AlAs Quantum Hall Ferromagnet

E. P. De Poortere, E. Tutuc, and M. Shayegan
Phys. Rev. Lett. 91, 216802 – Published 20 November 2003; Erratum Phys. Rev. Lett. 91, 239901 (2003)

Abstract

Magnetic transitions in AlAs two-dimensional electrons give rise to sharp resistance spikes within the quantum Hall effect. Such spikes are likely caused by carrier scattering at magnetic domain walls below the Curie temperature. We report a critical behavior in the temperature dependence of the spike width and amplitude, from which we deduce the Curie temperature of the quantum Hall ferromagnet. Our data also reveal that the Curie temperature increases monotonically with carrier density.

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  • Received 14 April 2003
  • Corrected 25 November 2003

DOI:https://doi.org/10.1103/PhysRevLett.91.216802

©2003 American Physical Society

Corrections

25 November 2003

Erratum

Publisher’s Note: Critical Resistance in the AlAs Quantum Hall Ferromagnet [Phys. Rev. Lett. 91, 216802 (2003)]

E. P. De Poortere, E. Tutuc, and M. Shayegan
Phys. Rev. Lett. 91, 239901 (2003)

Authors & Affiliations

E. P. De Poortere*, E. Tutuc, and M. Shayegan

  • Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA

  • *Current address: Department of Physics, Columbia University, New York, New York 10027, USA

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Issue

Vol. 91, Iss. 21 — 21 November 2003

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