Ferromagnetic and random spin ordering in diluted magnetic semiconductors

Abstract

In a diluted magnetic semiconductor system, the exchange interaction between magnetic impurities has two independent components: a direct antiferromagnetic interaction and a ferromagnetic interaction mediated by charge carriers. Depending on the system parameters, the ground state of the system may be ordered either ferromagnetically or randomly. In this paper we use percolation theory to find the ferromagnetic transition temperature and the location of the quantum critical point separating the ferromagnetic phase and a valence bond glass phase.

9 pages, 2 figures, a reference added

References in corpus (9)

• Polaron percolation in diluted magnetic semiconductors
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Cited by in corpus (8)

• Helical order in one-dimensional magnetic atom chains and possible emergence of Majorana bound states
• Theory of carrier mediated ferromagnetism in dilute magnetic oxides
• Spin-glass-like behavior of Ge:Mn
• Magnetism in (III, Mn)-V Diluted Magnetic Semiconductors: Effective Heisenberg Model
• Clustering in disordered ferromagnets: The Curie temperature in diluted magnetic semiconductors
• Mesoscopic gap fluctuations in an unconventional superconductor
• Re-entrant ferromagnetism in a generic class of diluted magnetic semiconductors
• Magnetoenhancement of superconductivity in composite D-wave superconductors