Terahertz spin-current dynamics in ferromagnet/heavy-metal stacks are unchanged when pump photon energy is varied from 1.5 to 3 eV, indicating ultrafast electron heating, not hot-electron injection, dominates.
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Ultrafast electron heating as the dominant driving force of photoinduced terahertz spin currents
Terahertz spin-current dynamics in ferromagnet/heavy-metal stacks are unchanged when pump photon energy is varied from 1.5 to 3 eV, indicating ultrafast electron heating, not hot-electron injection, dominates.