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Ultrafast dynamics of localized magnetic moments in the unconventional Mott insulator Sr2IrO4
- Krupin, O;
- Dakovski, GL;
- Kim, BJ;
- Kim, JW;
- Kim, Jungho;
- Mishra, S;
- Chuang, Yi-De;
- Serrao, CR;
- Lee, W-S;
- Schlotter, WF;
- Minitti, MP;
- Zhu, D;
- Fritz, D;
- Chollet, M;
- Ramesh, R;
- Molodtsov, SL;
- Turner, JJ
Published Web Location
https://doi.org/10.1088/0953-8984/28/32/32lt01Abstract
We report a time-resolved study of the ultrafast dynamics of the magnetic moments formed by the [Formula: see text] states in Sr2IrO4 by directly probing the localized iridium 5d magnetic state through resonant x-ray diffraction. Using optical pump-hard x-ray probe measurements, two relaxation time scales were determined: a fast fluence-independent relaxation is found to take place on a time scale of 1.5 ps, followed by a slower relaxation on a time scale of 500 ps-1.5 ns.
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