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Lattice dynamics of FeSb2

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arxiv 1108.0581 v3 pith:TDWO4ORI submitted 2011-08-01 cond-mat.mtrl-sci

Lattice dynamics of FeSb2

N. Lazarevic , M. M. Radonjic , D. Tanaskovic , Rongwei Hu , C. Petrovic , Z. V. Popovic This is my paper
classification cond-mat.mtrl-sci
keywords modesfesb2dynamicslatticephononramansymmetryactive
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The lattice dynamics of FeSb2 is investigated by the first-principles DFT calculations and Raman spectroscopy. All Raman and infra-red active phonon modes are properly assigned. The calculated and measured phonon energies are in good agreement except for the B3g symmetry mode. We have observed strong mixing of the Ag symmetry modes, with the intensity exchange in the temperature range between 210 K and 260 K. The Ag modes repulsion increases by doping FeSb2 with Co. There are no signatures of the electron-phonon interaction for these modes.

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