Strain engineering of the charge and spin-orbital interactions in Sr₂IrO₄.

ABSTRACT: In the high spin-orbit-coupled Sr₂IrO₄, the high sensitivity of the ground state to the details of the local lattice structure shows a large potential for the manipulation of the functional properties by inducing local lattice distortions. We use epitaxial strain to modify the Ir-O bond geometry in Sr₂IrO₄ and perform momentum-dependent resonant inelastic X-ray scattering (RIXS) at the metal and at the ligand sites to unveil the response of the low-energy elementary excitations. We observe that the pseudospin-wave dispersion for tensile-strained Sr₂IrO₄ films displays large softening along the [h,0] direction, while along the [h,h] direction it shows hardening. This evolution reveals a renormalization of the magnetic interac

SUBMITTER: Paris E 

PROVIDER: S-EPMC7547152 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature