Table 1 Overview of magnetic mechanisms and relevant symmetries
From: Ultrafast terahertz emission from emerging symmetry-broken materials
Mechanism | Common structure | B field sensitivity | Pump polarization sensitivity | Broken symmetries |
|---|---|---|---|---|
Inverse spin-Hall effect (ISHE) | FM/NM | Yes, through FM layer magnetization | No | \({\mathscr{P}}\) (interface) \({\mathscr{T}}\) (FM) \(\to\) separated \({\mathscr{P}}{\mathscr{T}}\) |
Inverse Rashba-Edelstein effect (IREE) | FM/NM1/NM2 | Yes, through FM layer magnetization | No | \({\mathscr{P}}\) (NM1/NM2 interface) \({\mathscr{T}}\) (FM) \(\to\) separated \({\mathscr{P}}{\mathscr{T}}\) |
Inverse spin–orbit torque (ISOT) | FM/NM | Yes, through the FM layer magnetization | Phase change depending on circular polarization state | \({\mathscr{P}}\) & \({\mathscr{T}}\) (interface) \(\to\) local \({\mathscr{P}}{\mathscr{T}}\) |
Coherent magnons | AFM | Possible, depending on material | Yes, specifics depend on structure | \({\mathscr{T}}\) |
