Interplay of Electronic and Spin Degrees in Ferromagnetic SrRuO<sub>3</sub>: Anomalous Softening of the Magnon Gap and Stiffness - CEA - Université Paris-Saclay
Article Dans Une Revue Physical Review Letters Année : 2019

Interplay of Electronic and Spin Degrees in Ferromagnetic SrRuO3: Anomalous Softening of the Magnon Gap and Stiffness

Résumé

The magnon dispersion of ferromagnetic SrRuO3 was studied by inelastic neutron scattering experiments on single crystals as a function of temperature. Even at low temperature the magnon modes exhibit substantial broadening pointing to strong interaction with charge carriers. We find an anomalous temperature dependence of both the magnon gap and the magnon stiffness, which soften upon cooling in the ferromagnetic phase. Both effects trace the temperature dependence of the anomalous Hall effect and can be attributed to the impact of Weyl points, which results in the same relative renormalization in the spin stiffness and magnon gap.
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Dates et versions

hal-02364305 , version 1 (22-10-2024)

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K. Jenni, S. Kunkemöller, D. Brüning, T. Lorenz, Yvan Sidis, et al.. Interplay of Electronic and Spin Degrees in Ferromagnetic SrRuO3: Anomalous Softening of the Magnon Gap and Stiffness. Physical Review Letters, 2019, 123 (1), pp.017202. ⟨10.1103/PhysRevLett.123.017202⟩. ⟨hal-02364305⟩
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