Speaker
Description
Here we study the anomalous interface magnetic excitations in the YBa2Cu3O7/manganite heterostructures. Detailed analysis of the inelastic part of the high-resolution Resonant Inelastic X-ray Scattering (RIXS) signal in conjunction with polarimetry show the presence of two magnon modes in the cuprate, including a unique, non-dispersive interface magnon, that appears only due to the interfacial proximity of the manganite layer.
We demonstrate that this low energy magnon originates from the interface copper layer in which intralayer exchange decreases due to Cu orbital reconstruction in favor of 3dz2-r2, instead of usual 3dx2-y2. Our work contributes to future studies of oxide interfaces offering perspectives for the design of artificial magnetic meta-materials.
