| Autor: |
Pastor, Ernest, Moreno-Mencía, David, Monti, Maurizio, Johnson, Allan S., Fleischmann, Nina, Wang, Cuixiang, Shi, Youguo, Liu, Xuerong, Mazzone, Daniel G., Dean, Mark P. M., Wall, Simon |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Physical Review B 105, 064409 (2022) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.105.064409 |
| Popis: |
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. |
| Databáze: |
arXiv |
| Externí odkaz: |
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