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arXiv · 2308.14939

Laser-enhanced magnetism in SmFeO$_3$

Mohsen Yarmohammadi·Marin Bukov·Vadim Oganesyan·Michael H. Kolodrubetz
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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.

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Mohsen Yarmohammadi, Marin Bukov, Vadim Oganesyan, Michael H. Kolodrubetz. 2023-08-28. Laser-enhanced magnetism in SmFeO$_3$. https://doi.org/10.1103/physrevb.109.224417

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