Ultrafast dynamics of localized magnetic moments in the unconventional Mott insulator Sr sub(2)IrO sub(4)

We report a time-resolved study of the ultrafast dynamics of the magnetic moments formed by the &${{J}_{\text{eff}}}=1/2$ ; states in Sr sub(2)IrO sub(4) by directly probing the localized iridium 5d magnetic state through resonant x-ray diffraction. Using optical pump-hard x-ray probe measuremen...

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Published inJournal of physics. Condensed matter Vol. 28; no. 32; pp. 32LT01 - 32LT35
Main Authors Krupin, O, Dakovski, G L, Kim, B J, Kim, J W, Kim, Jungho, Mishra, S, Chuang, Yi-De, Serrao, C R, Lee, W-S, Schlotter, W F, Minitti, M P, Zhu, D, Fritz, D, Chollet, M, Ramesh, R, Molodtsov, S L, Turner, J J
Format Journal Article
LanguageEnglish
Published 01.08.2016
Subjects
Balances (scales)
Condensed matter
Diffraction
Dynamic tests
Dynamics
Magnetic moment
Time
X-rays
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Summary:We report a time-resolved study of the ultrafast dynamics of the magnetic moments formed by the &${{J}_{\text{eff}}}=1/2$ ; states in Sr sub(2)IrO sub(4) 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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ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/28/32/32LT01