Tunable magnons of an antiferromagnetic Mott insulator via interfacial metal-insulator transitions.

ABSTRACT: Antiferromagnetic insulators present a promising alternative to ferromagnets due to their ultrafast spin dynamics essential for low-energy terahertz spintronic device applications. Magnons, i.e., quantized spin waves capable of transmitting information through excitations, serve as a key functional element in this paradigm. However, identifying external mechanisms to effectively tune magnon properties has remained a major challenge. Here we demonstrate that interfacial metal-insulator transitions offer an effective method for controlling the magnons of Sr₂IrO₄, a strongly spin-orbit coupled antiferromagnetic Mott insulator. Resonant inelastic x-ray scattering experiments reveal a significant softening of zone-boundary magnon energies in Sr₂IrO₄ f

SUBMITTER: Shrestha S 

PROVIDER: S-EPMC12000505 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature