Femtosecond formation dynamics of the spin Seebeck effect revealed by terahertz spectroscopy
oleh: Tom S. Seifert, Samridh Jaiswal, Joseph Barker, Sebastian T. Weber, Ilya Razdolski, Joel Cramer, Oliver Gueckstock, Sebastian F. Maehrlein, Lukas Nadvornik, Shun Watanabe, Chiara Ciccarelli, Alexey Melnikov, Gerhard Jakob, Markus Münzenberg, Sebastian T. B. Goennenwein, Georg Woltersdorf, Baerbel Rethfeld, Piet W. Brouwer, Martin Wolf, Mathias Kläui, Tobias Kampfrath
| Format: | Article |
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| Diterbitkan: | Nature Portfolio 2018-07-01 |
Deskripsi
Probing spin pumping in the terahertz regime allows one to reveal its initial elementary steps. Here, the authors show that the formation of the spin Seebeck current in YIG/Pt critically relies on hot thermalized metal electrons because they impinge on the metal-insulator interface with maximum noise.