Non-thermal breaking of magnetic order via photo-generated spin defects
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Inclou dades d'ús des de 2022
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hdl:2117/367142
Tipus de documentReport de recerca
Data publicació2021-04-09
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Abstract
In Mott insulators the evolution of antiferromagnetic order to superconducting or charge-density-wave-like states upon chemical doping underpins the control of quantum phases. Photo-doping can induce similar transitions on the ultrafast timescale, however the response of the spin system has remained elusive. Here, we use 4D-ultrafast optical spectroscopy to extract quantitative magnetic dynamics in the spin-orbit coupled Mott insulator Sr3Ir2O7. We demonstrate that light can non-thermally melt long-range spin order. At low fluences magnetic order recovers within 1 ps despite demagnetization of roughly 50%. However, high fluences induce a crossover to a long-lived demagnetized state without increasing the lattice temperature. We show that the generation of photo-induced spin defects enables a mechanism that stabilizes the demagnetized state which could help expose new transient phases.
CitacióMoreno, D. Non-thermal breaking of magnetic order via photo-generated spin defects. 2021.
Altres identificadorshttps://arxiv.org/abs/2104.04294
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