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首页> 外文期刊>Physica status solidi, B. Basic research >Anisotropic Elliott-Yafet theory and application to KC8 potassium intercalated graphite
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Anisotropic Elliott-Yafet theory and application to KC8 potassium intercalated graphite

机译:各向异性Elliott-Yafet理论及其在KC8钾插层石墨中的应用

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We report electron spin resonance (ESR) measurements on stage-I potassium intercalated graphite (KC8). Angular dependent measurements show that the spin-lattice relaxation time is longer when the magnetic field is perpendicular to the graphene layer as compared to when the magnetic field is in the plane. This anisotropy is analyzed in the framework of the Elliott-Yafet theory of spin-relaxation in metals. The analysis considers an anisotropic spin-orbit Hamiltonian and the first order perturbative treatment of Elliott is reproduced for this model Hamiltonian. The result provides an experimental input for the first-principles theories of spin-orbit interaction in layered carbon and thus to a better understanding of spin-relaxation phenomena in graphene and in other layered materials as well.
机译:我们报告了I级钾插层石墨(KC8)的电子自旋共振(ESR)测量。与角度有关的测量结果表明,与磁场在平面中相比,当磁场垂直于石墨烯层时,自旋晶格弛豫时间更长。在金属自旋弛豫的Elliott-Yafet理论的框架内分析了这种各向异性。分析考虑了各向异性的自旋轨道哈密顿量,并且对该模型哈密顿量重现了Elliott的一阶摄动处理。该结果为层状碳中自旋轨道相互作用的第一性原理提供了实验输入,从而更好地理解了石墨烯和其他层状材料中的自旋弛豫现象。

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