Idioma:

Femtosecond formation dynamics of the spin Seebeck effect revealed by terahertz spectroscopy

Seifert, Tom S ; Jaiswal, Samridh ; Barker, Joseph ; Weber, Sebastian T ; Razdolski, Ilya ; Cramer, Joel ; Gueckstock, Oliver ; Maehrlein, Sebastian F ; Nadvornik, Lukas ; Watanabe, Shun ; Ciccarelli, Chiara ; Melnikov, Alexey ; Jakob, Gerhard ; Münzenberg, Markus ; Goennenwein, Sebastian T B ; Woltersdorf, Georg ; Rethfeld, Baerbel ; Brouwer, Piet W ; Wolf, Martin ; Kläui, Mathias ; Kampfrath, Tobias

Nature communications, 2018-07, Vol.9 (1), p.2899-11, Article 2899 [Periódico revisado por pares]

England: Nature Publishing Group

Texto completo disponível

Citações Citado por

Enviar para

Título:
Femtosecond formation dynamics of the spin Seebeck effect revealed by terahertz spectroscopy
Autor: Seifert, Tom S ; Jaiswal, Samridh ; Barker, Joseph ; Weber, Sebastian T ; Razdolski, Ilya ; Cramer, Joel ; Gueckstock, Oliver ; Maehrlein, Sebastian F ; Nadvornik, Lukas ; Watanabe, Shun ; Ciccarelli, Chiara ; Melnikov, Alexey ; Jakob, Gerhard ; Münzenberg, Markus ; Goennenwein, Sebastian T B ; Woltersdorf, Georg ; Rethfeld, Baerbel ; Brouwer, Piet W ; Wolf, Martin ; Kläui, Mathias ; Kampfrath, Tobias
Assuntos: Angular momentum ; Conduction ; Conduction electrons ; Electrons ; Femtosecond pulses ; Ferrimagnetism ; Infrared lasers ; Insulators ; Magnetism ; Magnons ; Metals ; Platinum ; Seebeck effect ; Spectroscopy ; Spectrum analysis ; Spin dynamics ; Yttrium ; Yttrium-iron garnet
É parte de: Nature communications, 2018-07, Vol.9 (1), p.2899-11, Article 2899
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: Understanding the transfer of spin angular momentum is essential in modern magnetism research. A model case is the generation of magnons in magnetic insulators by heating an adjacent metal film. Here, we reveal the initial steps of this spin Seebeck effect with <27 fs time resolution using terahertz spectroscopy on bilayers of ferrimagnetic yttrium iron garnet and platinum. Upon exciting the metal with an infrared laser pulse, a spin Seebeck current j arises on the same ~100 fs time scale on which the metal electrons thermalize. This observation highlights that efficient spin transfer critically relies on carrier multiplication and is driven by conduction electrons scattering off the metal-insulator interface. Analytical modeling shows that the electrons' dynamics are almost instantaneously imprinted onto j because their spins have a correlation time of only ~4 fs and deflect the ferrimagnetic moments without inertia. Applications in material characterization, interface probing, spin-noise spectroscopy and terahertz spin pumping emerge.
Editor: England: Nature Publishing Group
Idioma: Inglês

Links

View this record in MEDLINE/PubMed

Voltar para lista de resultados

Realização: Logos de Redes Sociais:

Femtosecond formation dynamics of the spin Seebeck effect revealed by terahertz spectroscopy

England: Nature Publishing Group

Buscando em bases de dados remotas. Favor aguardar.