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• W1981306581 abstract "Local density calculations of the electronic structure of FeSi, FeSi_{1-x}Al_x and Fe_{1-x}Ir_xSi systems in the B20 structure are presented. Pure FeSi has a semi-conducting gap of 6 mRy at 0 K. Effects of temperature (T) in terms of electronic and vibrational excitations are included. Various measurable properties, such as magnetic susceptibility chi(T), electronic specific heat C(T), thermoelectric power S(T), relative variations in resistivity rho(T), and peak positions in the density-of-states (DOS) are calculated. The feedback from vibrational disorder onto the electronic structure is found to be essential for a good description of most properties, although the results for S(T) in undoped FeSi can be described up to about 150 K without considerations of disorder. Above this T, only the filling of the gap due to disorder accompanied by exchange enhancement, can explain the large susceptiblity. The overall good agreement with experimental data for most properties in doped and pure FeSi suggests that this system is well described by LDA even at large T. Doped FeSi can be described quite well from rigid-band shifts of the Fermi energy on the DOS of pure FeSi. Spin-polarization in Ir doped FeSi leads to a semi-metallic magnetic state at low T. (Submitted to Phys. Rev. B)" @default.
• W1981306581 created "2016-06-24" @default.
• W1981306581 creator A5039198064 @default.
• W1981306581 date "1999-06-15" @default.
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• W1981306581 title "Electronic structure and properties of pure and doped<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>ε</mml:mi></mml:math>-FeSi from<b><i>ab initio</i></b>local-density theory" @default.
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• W1981306581 doi "https://doi.org/10.1103/physrevb.59.15002" @default.
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