Nitrogen based magnetic semiconductors

Details Nitrogen based magnetic semiconductors Nitrogen based magnetic semiconductors

2006-08-14

arxiv.org/abs/cond-mat/0608313v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 papges, 5 figures

Scientific paper

We describe a possible pathway to new magnetic materials with no conventional magnetic elements present. The substitution of Nitrogen for Oxygen in simple non magnetic oxides leads to holes in N 2$p$ states which form local magnetic moments. Because of the very large Hund's rule coupling of Nitrogen and O 2$p$ electrons and the rather extended spatial extend of the wave functions these materials are predicted to be ferromagnetic metals or small band gap insulators. Experimental studies support the theoretical calculations with regard to the basic electronic structure and the formation of local magnetic moments. It remains to be seen if these materials are magnetically ordered and if so below what temperature.

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