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- W2765984076 abstract "Abstract The Green function plays an essential role in the Korringa–Kohn–Rostoker(KKR) multiple scattering method . In practice, it is constructed from the regular and irregular solutions of the local Kohn–Sham equation and robust methods exist for spherical potentials. However, when applied to a non-spherical potential, numerical errors from the irregular solutions give rise to pathological behaviors of the charge density at small radius. Here we present a full-potential implementation of the fully-relativistic KKR method to perform ab initio self-consistent calculation by directly solving the Dirac differential equations using the generalized variable phase (sine and cosine matrices) formalism Liu et al. (2016). The pathology around the origin is completely eliminated by carrying out the energy integration of the single-site Green function along the real axis. By using an efficient pole-searching technique to identify the zeros of the well-behaved Jost matrices, we demonstrated that this scheme is numerically stable and computationally efficient, with speed comparable to the conventional contour energy integration method, while free of the pathology problem of the charge density. As an application, this method is utilized to investigate the crystal structures of polonium and their bulk properties, which is challenging for a conventional real-energy scheme. The noble metals are also calculated, both as a test of our method and to study the relativistic effects ." @default.
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- W2765984076 date "2018-03-01" @default.
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- W2765984076 title "Fully-relativistic full-potential multiple scattering theory: A pathology-free scheme" @default.
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- W2765984076 doi "https://doi.org/10.1016/j.cpc.2017.10.011" @default.
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