Magnetic moments and metallic behavior of two-dimensional Ni clusters
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We have calculated the average magnetic moments per atom μ̄ of two-dimensional nickel clusters (NiN) with different geometrical shapes and two different sizes (N = 7 and 19). The spin-polarized electronic structure has been calculated with a self-consistent tight-binding method considering the 3d, 4s, and 4p valence electrons. We discuss the dependence of the s, p, and d contribution of the magnetic moment on the geometrical shape and the average coordination number. We also study the nonmetal-metal transition of the two-dimensional clusters using Kubo%27s criterion.
We have calculated the average magnetic moments per atom μ̄ of two-dimensional nickel clusters (NiN) with different geometrical shapes and two different sizes (N = 7 and 19). The spin-polarized electronic structure has been calculated with a self-consistent tight-binding method considering the 3d, 4s, and 4p valence electrons. We discuss the dependence of the s, p, and d contribution of the magnetic moment on the geometrical shape and the average coordination number. We also study the nonmetal-metal transition of the two-dimensional clusters using Kubo's criterion.
