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Title: Ultrafast dynamics of localized magnetic moments in the unconventional Mott insulator Sr 2IrO 4

Abstract

Here, 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 2IrO 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.

Authors:
 [1];  [2];  [3];  [3];  [3];  [4];  [4];  [5];  [2];  [2];  [2];  [2];  [2];  [2];  [5];  [6];  [2]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States); European XFEL, Hamburg (Germany)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. Univ. of California, Berkeley, CA (United States)
  6. European XFEL, Hamburg (Germany); TU Bergakademie Freiberg, Freiberg (Germany); ITMO Univ., St. Petersburg (Russia)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1332926
Grant/Contract Number:
AC02-76SF00515; AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Physics. Condensed Matter
Additional Journal Information:
Journal Volume: 28; Journal Issue: 32; Journal ID: ISSN 0953-8984
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; iridates; spin-orbit coupling materials; free-electron laser science; resonant diffraction; ultra-fast x-ray studies; magnetism; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

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., and Turner, J. J. Ultrafast dynamics of localized magnetic moments in the unconventional Mott insulator Sr2IrO4. United States: N. p., 2016. Web. doi:10.1088/0953-8984/28/32/32LT01.
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. Ultrafast dynamics of localized magnetic moments in the unconventional Mott insulator Sr2IrO4. United States. doi:10.1088/0953-8984/28/32/32LT01.
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., and Turner, J. J. 2016. "Ultrafast dynamics of localized magnetic moments in the unconventional Mott insulator Sr2IrO4". United States. doi:10.1088/0953-8984/28/32/32LT01. https://www.osti.gov/servlets/purl/1332926.
@article{osti_1332926,
title = {Ultrafast dynamics of localized magnetic moments in the unconventional Mott insulator Sr2IrO4},
author = {Krupin, O. and Dakovski, G. L. and Kim, B. J. and Kim, J. W. and Kim, Jungho and Mishra, S. and Chuang, Yi -De and Serrao, C. R. and Lee, W. -S. and Schlotter, W. F. and Minitti, M. P. and Zhu, D. and Fritz, D. and Chollet, M. and Ramesh, R. and Molodtsov, S. L. and Turner, J. J.},
abstractNote = {Here, we report a time-resolved study of the ultrafast dynamics of the magnetic moments formed by the ${{J}_{\text{eff}}}=1/2$ 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.},
doi = {10.1088/0953-8984/28/32/32LT01},
journal = {Journal of Physics. Condensed Matter},
number = 32,
volume = 28,
place = {United States},
year = 2016,
month = 6
}

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