Fig. 2: Evolution of electron and spin subsystems over time.
From: Driving spin chirality by electron dynamics in laser-excited antiferromagnets
The laser hits at t = t0, the magnetisation dynamics starts at t = t1 and the slow relaxation dynamics starts at t = t2. a Occupation of electronic states over time at half filling. The colours correspond to the eigenvalues (shown in inset). The black dashed line shows the average occupation which remains at 0.5. b Time evolution of magnetisation \(\hat{{{{{{{{\bf{M}}}}}}}}}\) (solid) and effective field B (transparent, dotted) for 17th site. Yellow line denotes the laser pulse. c Average magnitude of the torque (\(\langle | {{{{{{{\boldsymbol{\tau }}}}}}}}| \rangle =1/N\mathop{\sum }\nolimits_{i}^{N}| {\mu }_{B}{\hat{{{{{{{{\bf{M}}}}}}}}}}_{i}\times {{{{{{{{\bf{B}}}}}}}}}_{i}|\) in blue, scale on the left) and rate of change of energy (dE/dt, \({\log }_{10}\) scale on the right). Green and red colours correspond absorption and dissipation of energy. d Evolution of average chirality components and relative angle over time. The shaded regions show the root mean square deviation.
