Fig. 1: Spin dynamics, and electron and phonon energy dynamics.
From: Giant localised spin-Peltier effect due to ultrafast domain wall motion in antiferromagnetic metals
a In Mn2Au the ions of Mn provide the spins (white arrows). Two magnetic domains are separated by a moving domain wall (DW), defined by its position and velocity (q, v). b Subpicosecond heat dissipation is provided via coupling of the spins' degrees of freedom located at the DW to the electrons defined by Gs−e. This creates a localised heat wave of hot electrons which accompanies the moving DW. These hot electrons are now in non thermal equilibrium with the lattice, described by a phonon temperature. The electron–phonon coupling, Ge−ph, is responsible for the heat transfer from the hot electrons to the colder phonons. This process thermalises the electron and phonon system to a final common temperature.
