Impurity-semiconductor band hybridization effects on the critical temperature of diluted magnetic semiconductors
نویسندگان
چکیده
منابع مشابه
Magnetic Impurity States and Ferromagnetic Interaction in Diluted Magnetic Semiconductors
The electronic structure of diluted magnetic semiconductors is studied, especially focusing on the hole character. The Haldane-Anderson model is extend to a magnetic impurity, and is analyzed in the Hartree-Fock approximation. Due to the strong hybridization of an impurity d-states with host p-states, it is shown that holes are created in the valence band, at the same time the localized magneti...
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F. Popescu,1,* C. Şen,1,2 E. Dagotto,3,4 and A. Moreo3,4 1Department of Physics, Florida State University, Tallahassee, Florida 32306, USA 2National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA 3Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA 4Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Ten...
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The susceptibility and specific heat experimental results of the diluted magnetic semiconductors (DMS) are incorporated in a model based on short-range as well as long-range interaction in a random may of magnetic ions. The so-called nearestneighbor pair approximation (NNPA) is applied. It appears that the calculated values of zero field specific heat and Curie-Weiss temperature based on th...
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In recent years, disorder has been shown to be crucial for the understanding of diluted magnetic semiconductors. Effects of disorder in these materials are reviewed with the emphasis on theoretical works. The types and spatial distribution of defects are discussed. The effect of disorder on the intimately related transport and magnetic properties are considered from the viewpoint of both the ba...
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We present a quantitative theory for the effects of correlated doping on the ferromagnetism of diluted magnetic semiconductors. It predicts that room temperature ferromagnetism should be possible in homogeneous, but correlated, samples of MnxGa1−xAs. The theory predicts lower critical temperatures for MnxGa1−xN. Typeset using REVTEX email:[email protected] Also in the CNRS,email:[email protected] emai...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2002
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.66.075218