Ultrafast dynamics of localized magnetic moments in the unconventional Mott insulator Sr2IrO4
Krupin, O., G.L. Dakovski, B.J. Kim, J.W. Kim, J. Kim, S. Mishra, Y.-D. Chuang, C.R. Serrao, W.-S. Lee, W.F. Schlotter, M.P. Minitti, D. Zhu, D. Fritz, M. Chollet, Ramamoorthy Ramesh, S.L. Molodtsov, J.J. Turner
We report a time-resolved study of the ultrafast dynamics of the magnetic moments formed by the 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. © 2016 IOP Publishing Ltd.
Journal of Physics Condensed Matter
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