Jiménez-Cavero, Pilar Gueckstock, Oliver Nádvorník, Lukas Lucas, Irene Seifert, Tom S. Wolf, Martin Rouzegar, Reza Brouwer, Piet W. Becker, Sven Jakob, Gerhard Kläui, Mathias Guo, Chenyang Wan, Caihua Han, Xiufeng Jin, Zuanming Zhao, Hui Wu, Di Morellón, Luis Kampfrath, Tobias Transition of laser-induced terahertz spin currents from torque- to conduction-electron-mediated transport Phys. Rev. B 10.1103/PhysRevB.105.184408 2022 2022