Nonlinear spin control by terahertz-driven anisotropy fields

Baierl, S.; Hohenleutner, M.; Kampfrath, Tobias; Zvezdin, A. K.; Kimel, A. V.; Huber, R.; Mikhaylovskiy, R. V.

doi:10.1038/nphoton.2016.181

アイテム詳細

登録内容を編集ファイル形式で保存

一時保存へ追加

このアイテムの新しいバージョンが利用可能です:
https://pure.mpg.de/pubman/item/item_2375782_8

詳細要約

公開

学術論文

Nonlinear spin control by terahertz-driven anisotropy fields

MPS-Authors

/persons/resource/persons21693

Kampfrath, Tobias
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

External Resource

There are no locators available

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

フルテキスト (公開)

13393_2_merged_1470770945.pdf
(全文テキスト（全般）), 18MB

付随資料 (公開)

There is no public supplementary material available

引用

Baierl, S., Hohenleutner, M., Kampfrath, T., Zvezdin, A. K., Kimel, A. V., Huber, R., & Mikhaylovskiy, R. V. (2016). Nonlinear spin control by terahertz-driven anisotropy fields. Nature Photonics, 10(11), 715-718. doi:10.1038/nphoton.2016.181.

引用: https://hdl.handle.net/11858/00-001M-0000-002C-2437-8

要旨

Future information technologies, such as ultrafast data recording, quantum computation or spintronics, call for ever faster spin control by light^1-16. Intense terahertz pulses can couple to spins on the intrinsic energy scale of magnetic excitations^5,11. Here, we explore a novel electric dipole-mediated mechanism of nonlinear terahertz-spin coupling that is much stronger than linear Zeeman coupling to the terahertz magnetic field^5,10. Using the prototypical antiferromagnet thulium orthoferrite (TmFeO₃), we demonstrate that resonant terahertz pumping of electronic orbital transitions modifies the magnetic anisotropy for ordered Fe³⁺ spins and triggers large-amplitude coherent spin oscillations. This mechanism is inherently nonlinear, it can be tailored by spectral shaping of the terahertz waveforms and its efficiency outperforms the Zeeman torque by an order of magnitude. Because orbital states govern the magnetic anisotropy in all transition-metal oxides, the demonstrated control scheme is expected to be applicable to many magnetic materials.