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We directly resolve energy transfer pathways from electrons to magnons in multiferroic HoMnO3 using ultrafast optical/terahertz spectroscopy. This reveals that energy is initially transferred from electrons to phonons and subsequently to magnons through spin-lattice relaxation.
Temperature-dependent femtosecond optical spectroscopy is used to track polaron dynamics in the spin and charge frustrated system LuFe2O4, revealing the influence of charge and spin ordering on polaron excitation, redressing, and coupling to on-site excitations.
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