Investigation of Spin-Glass Transition in Semimagnetic Quantum Wells Based on Cd1-xMnxTe by Means of Optical Spectroscopy |
| U. Zehnder, D.R. Yakovlev, W. Ossau, A. Waag, G. Landwehr Physikalisches Institut der Universität Würzburg, 97074 Würzburg, Germany T. Wojtowicz, G. Karczewski and J. Kossut Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland |
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| The spin-glass transition in Cd1-xMnxTe epitaxial layers and bulk samples with 0.24 ≤ x ≤ 0.43 and in quantum well structures on the basis of Cd1-xMnxTe were investigated by means of optical spectroscopy. Reduction of dimensionality of Cd1-xMnxTe layers down to the quasi-two-dimensional case realized in Cd1-xMnxTe/Cd1- yMnyTe heterostructures frustrates the spin-glass formation, which is in agreement with theoretical predictions. The spin-glass formation is also frustrated in the vicinity of interfaces between semimagnetic and nonmagnetic semiconductors in CdTe/Cd1-xMnxTe quantum wells. |
| DOI: 10.12693/APhysPolA.92.1075 PACS numbers: 78.55.Et, 71.35.Ji |