Phys. Rev. Lett. 79, 511–514 (1997)

Observation of a Ferromagnetic Transition Induced by Two-Dimensional Hole Gas in Modulation-Doped CdMnTe Quantum Wells

Abstract

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A. Haury¹, A. Wasiela¹, A. Arnoult¹, J. Cibert¹, S. Tatarenko¹, T. Dietl^1,2, and Y. Merle d'Aubigné¹
¹Laboratoire de Spectrométrie Physique, Université Joseph Fourier Grenoble 1 - CNRS (UMR 55 88), Boite Postale 87, F-38402 Saint Martin d'Hères Cedex, France
²Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, PL-02668 Warszawa, Poland

Received 18 April 1997; published in the issue dated 21 July 1997

The presence of a ferromagnetic transition in single, modulation-doped, 8 nm quantum well of Cd_0.976Mn_0.024Te/Cd_0.66Mg_0.27Zn_0.07Te:N is evidenced by photoluminescence magnetospectroscopy. The transition is driven by long range Ruderman-Kittel-Kasuya-Yosida interactions between Mn spins, mediated by 2×10¹¹ holes per cm². It occurs at 1.8 K, in agreement with a mean-field model.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.79.511

DOI:

10.1103/PhysRevLett.79.511

PACS:

75.70.Cn, 75.30.Hx, 75.50.Pp, 78.55.Et

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Phys. Rev. Lett. 79, 511–514 (1997)

Observation of a Ferromagnetic Transition Induced by Two-Dimensional Hole Gas in Modulation-Doped CdMnTe Quantum Wells