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Results of density-functional calculations for isolated transition metal (TM V; Cr; Mn; Fe; Co; Ni on cation sites) doped GaN demonstrate a novel magnetic metastability in dilute magnetic semiconductors. In addition to the expected high spin ground states (4 B =Mn and 5 B =Fe), there are also metastable low spin states (0 B =Mn and 1 B =Fe)-a phenomenon that can be explained in simple terms on the basis of the ligand field theory. The transition between the high spin and low spin statesdoi:10.1103/physrevlett.97.016402 pmid:16907389 fatcat:amggykwocfbghc5kixko3bzlzy