Details

Autor(en) / Beteiligte

• Freimuth, Frank
• Blügel, Stefan
• Mokrousov, Yuriy

Titel

Laser-induced torques in metallic antiferromagnets

Ist Teil von

• Physical review. B, 2021-05, Vol.103 (17), Article 174429

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2021

Link zum Volltext

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• We study laser-induced torques in the antiferromagnet Mn2Au. We find that even linearly polarized light may induce laser-induced torques in Mn2Au; that is, the light does not have to be circularly polarized. The laser-induced torques in Mn2Au are comparable in magnitude to those in the ferromagnets Fe, Co, and FePt at optical frequencies. We also compute the laser-induced torques at terahertz (THz) frequencies and compare them to the spin-orbit torques (SOTs) excited by THz laser pulses. We find the SOTs are dominant at THz frequencies for the laser-field strengths used in experiments. Additionally, we show that the matrix elements of the spin-orbit interaction (SOI) can be used to add SOI only during the Wannier interpolation, which we call Wannier interpolation of SOI. This technique allows us to perform the Wannier interpolation conveniently for many magnetization directions from a single set of Wannier functions.