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New Diluted ferromagnetic semiconductor Li(Zn,Mn)P with decoupled charge and spin doping

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arxiv 1308.4929 v1 pith:2H342ASQ submitted 2013-08-22 cond-mat.mtrl-sci cond-mat.str-elcond-mat.supr-con

Z. Deng , K. Zhao , B.Gu , W.Han , J.L. Zhu , X. C. Wang , X. Li , Q.Q. Liu
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R.C. Yu T. Goko B. Frandsen L. Liu Jinsong Zhang Yayu Wang F. L. Ning S. Maekawa Y.J. Uemura C.Q.Jin
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classification cond-mat.mtrl-scicond-mat.str-elcond-mat.supr-con
keywords chargedopingsemiconductorspindilutedexcessferromagneticlithium
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We report the discovery of a new diluted magnetic semiconductor, Li(Zn,Mn)P, in which charge and spin are introduced independently via lithium off-stoichiometry and the isovalent substitution of Mn2+ for Zn2+, respectively. Isostructural to (Ga,Mn)As, Li(Zn,Mn)P was found to be a p-type ferromagnetic semiconductor with excess Lithium providing charge doping. First principles calculations indicate that excess Li is favored to partially occupy the Zn site, leading to hole doping. Ferromagnetism is mediated in semiconducting samples of relative low mobile carriers with a small coercive force, indicating an easy spin flip.

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