Resonant excitations of spins, orbitals and lattice probed by x-rays

Urs Staub1

1Swiss Light Source, Paul Scherrer Institute, 4232 Villigen PSI, Switzerland

Results will be presented of how the spins, the orbitals and the lattice react to phase stable excitations of low energy phonons, electromagnons or orbitals. Examples will cover soft mode driving of the ferroelectric mode in SrTiO3, [1] electromagnon excitation in hexaferrites and orbital excitation in magnetically frustrated Tb2Ti2O7. These ultrafast changes caused by the excitations are probed by resonant and non-resonant X-ray diffraction to obtain the lattice the spin and/or the orbital dynamics. Recent results from SwissFEL will be presented.

1. M. Kozina et al., Nat. Phys. 15, 387 (2019).

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