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

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.

Authors:
 [1];  [2];  [3];  [3];  [3];  [4];  [4];  [5];  [6];  [2];  [2];  [2];  [2];  [2];  [5];  [7];  [2]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States); European X-ray Free-Electron Laser (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. Stanford Univ., Menlo Park, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  7. European X-ray Free-Electron Laser (XFEL), Hamburg (Germany); TU Bergakademie Freiberg, Freiberg (Germany); IT MO Univ., St. Petersburg (Russia)
Publication Date:
Research Org.:
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 Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1332926
Alternate Identifier(s):
OSTI ID: 1294596; OSTI ID: 1456949
Grant/Contract Number:  
AC02-06CH11357; AC02-76SF00515; AC02-05CH11231
Resource Type:
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:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; iridates; spin-orbit coupling materials; free-electron laser science; resonant diffraction; ultra-fast x-ray studies; magnetism; 74 ATOMIC AND MOLECULAR PHYSICS

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. https://doi.org/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. https://doi.org/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.. Thu . "Ultrafast dynamics of localized magnetic moments in the unconventional Mott insulator Sr2IrO4". United States. https://doi.org/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 = {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.},
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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