Terahertz spectroscopy as a tool for probing ultrafast spin currents in altermagnets

Abstract

Recent studies have shown nonrelativistic analogues to various ferromagnetic (FM) phenomena in altermagnets (AM) [1], but their ultrafast versions at THz frequencies remain unknown. In my work, I use THz time domain spectroscopy to study the spin-polarization and spin-splitter effects in D-wave altermagnets using effect of spintronic THz pulse emission [2] as well as the effect of rotation of THz polarization via altermagnetic anomalous Hall effect.

[1] Phys. Rev. X 12, 040501 (2022)

[2] Nat. Phot. 10, 483 (2016)

Keywords

• Terahertz
• spectroscopy
• tool
• for
• probing
• ultrafast
• spin
• currents
• altermagnets