Details

Autor(en) / Beteiligte

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

Titel

Charge and spin photocurrents in the Rashba model

Ist Teil von

• Physical review. B, 2021-02, Vol.103 (7), p.1, Article 075428

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2021

Link zum Volltext

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• In metallic noncentrosymmetric crystals and at surfaces the response of spin currents and charge currents to applied electric fields contains contributions that are second order in the electric field, which are forbidden by symmetry in centrosymmetric systems. Thereby, photocurrents and spin photocurrents can be generated in inversion asymmetric metals by the application of femtosecond laser pulses. We study the laser-induced charge current in the ferromagnetic Rashba model with in-plane magnetization and find that this magnetic photogalvanic effect can be tuned to be comparable in size to the laser-induced photocurrents measured experimentally in magnetic bilayer systems such as Co/Pt. Additionally, we show that femtosecond laser pulses excite strong spin currents in the nonmagnetic Rashba model when the Rashba parameter is large.