Signatures of electron-boson coupling in the half-metallic ferromagnetMn5Ge3: Study of electron self-energyΣ(ω)obtained from infrared spectroscopy
| Autor: | Sasa Dordevic, Rongwei Hu, N. Stojilovic, L. W. Kohlman, Cedomir Petrovic |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Physical Review B. 80 |
| ISSN: | 1550-235X 1098-0121 |
| Popis: | We report results of our infrared and optical spectroscopy study of a half-metallic ferromagnet Mn$_5$Ge$_3$. This compound is currently being investigated as a potential injector of spin polarized currents into germanium. Infrared measurements have been performed over a broad frequency (50 - 50000 cm$^{-1}$) and temperature (10 - 300 K) range. From the complex optical conductivity $\sigma(\omega)$ we extract the electron self-energy $\Sigma(\omega)$. The calculation of $\Sigma(\omega)$ is based on novel numerical algorithms for solution of systems of non-linear equations. The obtained self-energy provides a new insight into electron correlations in Mn$_5$Ge$_3$. In particular, it reveals that charge carriers may be coupled to bosonic modes, possibly of magnetic origin. |
| Databáze: | OpenAIRE |
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