Abstract
We develop a theory for magnetism of strongly correlated systems driven out of equilibrium by an external time-dependent electric field. We provide expressions for computing the effective interaction parameters between electronic spins, including a new interaction that we name twist exchange. Our theory is suitable for laser-induced ultrafast magnetization dynamics.
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Acknowledgments
The authors acknowledge useful discussions with Johan Mentink, Martin Eckstein, Laszlo Szunyogh, Oksana Chubykalo-Fesenko, Ulrich Nowak, Peter Oppeneer, Theo Rasing and Roy Chantrell. This work is supported by the European Union ERC Grant Agreement No. 281043 (FEMTOSPIN) and SFB925 (Germany).
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Secchi, A., Brener, S., Lichtenstein, A.I., Katsnelson, M.I. (2015). Non-equilibrium Spin–Spin Interactions in Strongly Correlated Systems. In: Bigot, JY., Hübner, W., Rasing, T., Chantrell, R. (eds) Ultrafast Magnetism I. Springer Proceedings in Physics, vol 159. Springer, Cham. https://doi.org/10.1007/978-3-319-07743-7_57
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DOI: https://doi.org/10.1007/978-3-319-07743-7_57
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