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

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.

doi:10.1088/0953-8984/28/32/32LT01

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

Journal Article · Thu Jun 16 00:00:00 EDT 2016 · Journal of Physics. Condensed Matter

DOI:https://doi.org/10.1088/0953-8984/28/32/32LT01· OSTI ID:1332926

Krupin, O. ^[1]; Dakovski, G. L. ^[2]; Kim, B. J. ^[3]; Kim, J. W. ^[3]; Kim, Jungho ^[3]; Mishra, S. ^[4]; Chuang, Yi -De ^[4]; Serrao, C. R. ^[5]; Lee, W. -S. ^[6]; Schlotter, W. F. ^[2]; Minitti, M. P. ^[2]; Zhu, D. ^[2]; Fritz, D. ^[2]; Chollet, M. ^[2]; Ramesh, R. ^[5]; Molodtsov, S. L. ^[7]; Turner, J. J. ^[2]

SLAC National Accelerator Lab., Menlo Park, CA (United States); European X-ray Free-Electron Laser (XFEL), Hamburg (Germany)
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. of California, Berkeley, CA (United States)
Stanford Univ., Menlo Park, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
European X-ray Free-Electron Laser (XFEL), Hamburg (Germany); TU Bergakademie Freiberg, Freiberg (Germany); IT MO Univ., St. Petersburg (Russia)

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.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-06CH11357; AC02-76SF00515; AC02-05CH11231

OSTI ID:: 1332926

Alternate ID(s):: OSTI ID: 1294596; OSTI ID: 1456949

Journal Information:: Journal of Physics. Condensed Matter, Vol. 28, Issue 32; ISSN 0953-8984

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 11 works

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Recovery of photoexcited magnetic ordering in Sr ₂ IrO ₄ Li, Jiemin; Wang, Ruitang; Guo, Haizhong Journal of Physics: Condensed Matter, Vol. 31, Issue 25 https://doi.org/10.1088/1361-648x/ab123d	journal	April 2019
Ultrafast demagnetization of Pt magnetic moment in L1 ₀ -FePt probed by magnetic circular dichroism at a hard x-ray free electron laser Yamamoto, Kohei; Kubota, Yuya; Suzuki, Motohiro New Journal of Physics, Vol. 21, Issue 12 https://doi.org/10.1088/1367-2630/ab5ac2	journal	December 2019

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

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