Laser-enhanced magnetism in SmFeO${}_3$

Abstract

To coherently enhance inherent weak magnetic interactions in rare-earth orthoferrite SmFeO${}_3$ as a functional material for spintronic applications, we simulate the dissipative spin dynamics that are linearly and quadratically coupled to laser-driven infrared-active phonons. When linear coupling dominates, we discover a magnetophononic dynamical first-order phase transition in the nonequilibrium steady state which can inhibit strong enhancement of magnetic interactions. By contrast, when quadratic spin-phonon coupling dominates, no phase transition exists at experimentally relevant parameters. By utilizing a chirp protocol, the phase transition can be engineered, enabling stronger magnetic interactions. We also discuss the route for experimental observation of our results.

arXiv comment6 pages, 3 figures

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Cited by in corpus (8)

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• Phonon-driven multipolar dynamics in a spin-orbit coupled Mott insulator
• Dynamical phase transition in a strongly hybridized phonon-triplon chain
• Cavity-induced coherent magnetization and polaritons in altermagnets
• Cavity-assisted magnetization switching in a quantum spin-phonon chain
• Ultrafast dynamics of a fermion chain in a terahertz field-driven optical cavity
• Tuning magnetic interactions with nonequilibrium optical phonon populations: a theoretical study