Correlated Defects, Metal-Insulator Transition, and Magnetic Order in Ferromagnetic Semiconductors
نویسندگان
چکیده
منابع مشابه
Correlated defects, metal-insulator transition, and magnetic order in ferromagnetic semiconductors.
The effect of disorder on transport and magnetization in ferromagnetic III-V semiconductors, in particular (Ga,Mn)As, is studied theoretically. We show that Coulomb-induced correlations of the defect positions are crucial for the transport and magnetic properties of these highly compensated materials. We employ Monte Carlo simulations to obtain the correlated defect distributions. Exact diagona...
متن کامل2 00 2 Defect correlations , metal - insulator transition , and magnetic order in ferromagnetic semiconductors
Diluted ferromagnetic III-V semiconductors typically show a high degree of compensation. Compensation is connected to the presence of comparable densities of charged defects of either sign. This naturally leads to the development of strong correlations between defect positions during growth and annealing. We show that these correlations are required to understand the experimentally observed tra...
متن کاملMagnetic transition in a correlated band insulator
A. Euverte,1 S. Chiesa,2 R. T. Scalettar,3 and G. G. Batrouni1,4 1INLN, Université de Nice-Sophia Antipolis, CNRS; 1361 Route des Lucioles, F-06560 Valbonne, France 2Department of Physics, College of William & Mary, Williamsburg, Virginia 23185, USA 3Physics Department, University of California, Davis, California 95616, USA 4Institut Universitaire de France (Received 19 December 2012; published...
متن کاملar X iv : c on d - m at / 0 20 90 55 3 Se p 20 02 Defect correlations , metal - insulator transition , and magnetic order in ferromagnetic semiconductors
Diluted ferromagnetic III-V semiconductors typically show a high degree of compensation. Compensation is connected to the presence of comparable densities of charged defects of either sign. This naturally leads to the development of strong correlations between defect positions during growth and annealing. We show that these correlations are required to understand the experimentally observed tra...
متن کاملMagnetic order and dynamics in an orbitally degenerate ferromagnetic insulator.
Neutron scattering was used to determine the spin structure and the magnon spectrum of the Mott-Hubbard insulator YTiO3. The magnetic structure is complex, comprising substantial G-type and A-type antiferromagnetic components in addition to the predominant ferromagnetic component. The magnon spectrum, on the other hand, is gapless and nearly isotropic. We show that these findings are inconsiste...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2002
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.89.137201