Emergent exchange-driven giant magnetoelastic coupling in a correlated itinerant ferromagnet
arXiv:2505.09611 · doi:10.1038/s41567-025-02893-x
Abstract
The interaction between the electronic and structural degrees of freedom is central to several intriguing phenomena observed in condensed-matter physics. In magnetic materials, magnetic interactions couple to lattice degrees of freedom, resulting in magnetoelastic coupling, which is typically small and only detectable in macroscopic samples. Here we demonstrate a giant magnetoelastic coupling in the correlated itinerant ferromagnet SrRuO. We establish an effective control of magnetism in the surface layer and utilize it to probe the impact of magnetism on its electronic and structural properties. By using scanning tunnelling microscopy, we reveal subtle changes in the electronic structure dependent on ferromagnetic or antiferromagnetic alignment between the surface and subsurface layers. We further determine the consequences of the exchange force on the relaxation of the surface layer, which exhibits giant magnetostriction. Our results provide a direct measurement of the impact of exchange interactions and correlations on structural details in a quantum material, revealing how electronic correlations result in a strong electron-lattice coupling.
Main: 9 pages, 4 figures
References in corpus (21)
- Long-range incommensurate charge fluctuations in (Y,Nd)Ba2Cu3O(6+x)
- A `checkerboard' electronic crystal state in lightly hole-doped Ca_{2-x}Na_{x}CuO_{2}Cl_{2}
- Direct observation of van der Waals stacking dependent interlayer magnetism
- Giant and anisotropic many-body spin-orbit tunability in a strongly correlated kagome magnet
- How Cooper pairs vanish approaching the Mott insulator in Bi2Sr2CaCu2O8+d
- Bethe-Slater-curve-like behavior and interlayer spin-exchange coupling mechanisms in two-dimensional magnetic bilayers
- Competing Ground States in Triple-layered Sr4Ru3O10: Verging on Itinerant Ferromagnetism with Critical Fluctuations
- Field- and pressure-induced phases in SrRuO: A spectroscopic investigation
- Colossal Magnetoresistance by Avoiding a Ferromagnetic State in the Mott System Ca3Ru2O7
- Determining the Surface-To-Bulk Progression in the Normal-State Electronic Structure of Sr2RuO4 by Angle-Resolved Photoemission and Density Functional Theory
- Quasiparticle Interference of the van-Hove singularity in SrRuO
- Compass-like manipulation of electronic nematicity in SrRuO
- Specific Heat of Sr4Ru3O10
- On the engineering of higher-order Van Hove singularities in two dimensions
- Phase diagram of CeSb from magnetostriction and magnetization measurements: Evidence for ferrimagnetic and antiferromagnetic states
- Spin-orbit coupling induced Van Hove singularity in proximity to a Lifshitz transition in SrRuO
- Electronic Structure and Magnetism of the Triple-layered Ruthenate SrRuO
- Observation of a pressure-induced transition from interlayer ferromagnetism to intralayer antiferromagnetism in Sr4Ru3O10
- Periodic Atomic Displacements and Visualization of the Electron-Lattice Interaction in the Cuprate
- Layer-dependent spin-resolved electronic structure of ferromagnetic triple-layered ruthenate SrRuO
- Tunable positions of Weyl nodes via magnetism and pressure in the ferromagnetic Weyl semimetal CeAlSi