Journal
JOURNAL OF SUPERCONDUCTIVITY
Volume 18, Issue 1, Pages 37-40Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10948-005-2147-7
Keywords
materials design; ab initio calculation; p-impurity band; ferromagnetism
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We propose new-type ferromagnetic semiconductors based on CaO and 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 C, N, Si, or 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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