Ultrafast dynamics of localized magnetic moments in the unconventional Mott insulator Sr2IrO4

Publication Type	Journal Article

Authors	O Krupin 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
DOI	10.1088/0953-8984/28/32/32LT01
Abstract	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.
Notes	cited By 7
Journal	Journal of Physics Condensed Matter
Volume	28
Year of Publication	2016
Number	32
Publisher	Institute of Physics Publishing
ISSN Number	09538984
Keywords	electrons Magnetism Free electron lasers X ray diffraction Magnetic moments Spin-orbit couplings Optical pumping Time measurement iridates Localized magnetic moments Relaxation time scale Resonant diffraction Resonant x-ray diffraction Time resolved studies X-ray studies
Research Areas	Ramesh Lab
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