New Class Of High-T-C Diluted Ferromagnetic Semiconductors Based On K2s Without Transition Metal Elements
Journal of Superconductivity(2005)
Abstract
We propose new-type diluted ferromagnetic semiconductors (DMSs) based on K2S without any transition metal elements. These materials show transparent and half-metallic ferromagnetism if the deep-impurity-band width (W) induced by doping of Si of Ge impurities, and the electron-correlation energy (U) satisfy the Stoner's condition of highly-correlated electron system (U > W). Based on our first-principles calculations, we demonstrate that these materials satisfy the Stoner's condition, and could be new candidates for transparent and half-metallic DMSs.
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Key words
satisfiability,magnetic semiconductor,electron correlation,transition metal
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