Regensburg 2016 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 31: Magnetization and Demagnetization Dynamics II
MA 31.8: Vortrag
Mittwoch, 9. März 2016, 11:30–11:45, H34
Unified ab initio theory of the inverse Faraday effect — •Marco Berritta1, Ritwik Mondal1, Karel Carva2, and Peter M. Oppeneer1 — 1Uppsala University, Uppsala, Sweden — 2Charles University, Prague, Czech Republic
Nowadays, among the rich scenario of magneto-optical phenomena, the inverse Faraday effect (IFE) appears potentially a powerful tool for the control and manipulation of the magnetization of materials. Many studies have been recently performed, however a unifed theoretical interpretation of the IFE is still missing.
On the basis of a general formulation of the second order response to a circularly polarized light pulse [1], which allows to easily include relativistic effects, we perform ab initio calculations of the IFE. We present results of calculations for some non-magnetic materials in comparison with results for magnetic materials. We provide a unifed discussion of the relativistic contribution calculated from this theory in comparison to Dirac theory considerations made in [2]. Moreover, although previous theoretical models of the IFE take as an approximation the absence of absorption in materials, we find that absorption can leads to counterintuitive features that can be essential for achieving switching in magnetic materials.
M. Battiato, G. Barbalinardo, and P. M. Oppeneer, Phys. Rev. B 89, 014413 (2014).
R. Mondal, M. Berritta, C. Paillard, S. Singh, B. Dkhil, P. M. Oppeneer, and L. Bellaiche, Phys. Rev. B 92, 100402 (2015).