Figure 2.

Dynamics of the magnetic, electronic and structural degrees of freedom of a NdNiO₃ thin film, observed when resonantly driving a specific vibrational mode in an LaAlO₃ substrate below. (a) Transient momentum-resolved intensity of the (¼ ¼ ¼) diffraction peak measured at the 852-eV Ni L₃-edge, sensitive to antiferromagnetic ordering. (b) Transient peak intensity of the NdNiO₃ (2½ 2½ 2½) reflection, measured at X-ray energies resonant (8.346 keV, blue data) and off-resonant (8.329 keV, green data) with the Ni K-edge. (c) Spatio-temporal evolution of the NdNiO₃ lattice, magnetic and insulator-metal dynamics along the thin film out-of-plane direction. Individual phase fronts of insulator-to-metal, antiferromagnetic-to-paramagnetic and structural transitions propagate at different speeds from the hetero-interface into the nickelate film. Panel (a) is adapted from [51], panels (b,c) are adapted from [52].