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Magnetic coupling in dilute magnetic semiconductors: A new perspective
Author(s) -
Andriotis Antonis N.,
Me Madhu
Publication year - 2011
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201147120
Subject(s) - magnetic semiconductor , magnetism , ferromagnetism , impurity , condensed matter physics , inductive coupling , coupling (piping) , materials science , semiconductor , ab initio quantum chemistry methods , tetrahedron , transition metal , ab initio , chemical physics , chemistry , physics , crystallography , molecule , optoelectronics , quantum mechanics , biochemistry , organic chemistry , metallurgy , catalysis
The ferromagnetic coupling (FMC) among magnetic impurities in the dilute magnetic semiconductors (DMSs) ZnO and GaN is revisited within a molecular orbital (MO) approximation. In particular, based on computational results obtained by both ab initio and tight binding molecular dynamics methods, we demonstrate that the FMC appears to be the coupling between MOs consisting of MO‐parts confined in the tetrahedra centered at the cationic impurities. This new interpretation links the defect‐induced magnetism in DMSs and TMOs (transition metal oxides) to the previously proposed theories of magnetic organic salts and carbon‐based materials.