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  Ultrafast energy- and momentum-resolved dynamics of magnetic correlations in the photo-doped Mott insulator Sr2IrO4

Dean, M. P. M., Cao, Y., Liu, X., Wall, S., Zhu, D., Mankowsky, R., et al. (2016). Ultrafast energy- and momentum-resolved dynamics of magnetic correlations in the photo-doped Mott insulator Sr2IrO4. Nature Materials, 15(6), 601-605. doi:10.1038/nmat4641.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-54FA-4 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-E277-0
Genre: Journal Article

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© M. P. M. Dean et al.

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http://dx.doi.org/10.1038/nmat4641 (Publisher version)
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https://arxiv.org/abs/1604.02439 (Preprint)
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 Creators:
Dean, M. P. M.1, Author
Cao, Y.1, Author
Liu, X.2, 3, Author
Wall, S.4, Author
Zhu, D.5, Author
Mankowsky, Roman6, 7, Author              
Thampy, V.1, Author
Chen, X. M.1, Author
Vale, J. G.8, Author
Casa, D.9, Author
Kim, Jungho9, Author
Said, A. H.9, Author
Juhas, P.1, Author
Alonso-Mori, R.5, Author
Glownia, J. M.5, Author
Robert, A.5, Author
Robinson, J.5, Author
Sikorski, M.5, Author
Song, S.5, Author
Kozina, M.5, Author
Lemke, H.5, AuthorPatthey, L.10, AuthorOwada, S.11, AuthorKatayama, T.12, AuthorYabashi, M.11, AuthorTanaka, Yoshikazu11, AuthorTogashi, T.12, AuthorLiu, J.13, AuthorSerrao, C. Rayan14, AuthorKim, B. J.15, AuthorHuber, L.16, AuthorChang, C.-L.17, AuthorMcMorrow, D. F.8, AuthorFörst, Michael6, 7, Author              Hill, J. P.1, Author more..
Affiliations:
1Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973, USA, ou_persistent22              
2Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China, ou_persistent22              
3Collaborative Innovation Center of Quantum Matter, Beijing, China, ou_persistent22              
4ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain, ou_persistent22              
5Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA, ou_persistent22              
6Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
7Center for Free Electron Laser Science, D-22761 Hamburg, Germany, ou_persistent22              
8London Centre for Nanotechnology and Department of Physics and Astronomy, University College London, London WC1E 6BT, UK, ou_persistent22              
9Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA, ou_persistent22              
10SwissFEL, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland, ou_persistent22              
11RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan, ou_persistent22              
12Japan Synchrotron Radiation Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan, ou_persistent22              
13Department of Physics & Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA, ou_persistent22              
14Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720, USA, ou_persistent22              
15Max Planck Institute for Solid State Research, D-70569 Stuttgart, Germany, ou_persistent22              
16Institute for Quantum Electronics, ETH Zurich, CH-8093 Zurich, Switzerland, ou_persistent22              
17Zernike Institute for Advanced Materials, University of Groningen, Groningen, NL 9747AG, The Netherlands, ou_persistent22              

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Free keywords: Magnetic properties and materials; Raman spectroscopy; Ultrafast photonics
 Abstract: Measuring how the magnetic correlations evolve in doped Mott insulators has greatly improved our understanding of the pseudogap, non-Fermi liquids and high-temperature superconductivity. Recently, photo-excitation has been used to induce similarly exotic states transiently. However, the lack of available probes of magnetic correlations in the time domain hinders our understanding of these photo-induced states and how they could be controlled. Here, we implement magnetic resonant inelastic X-ray scattering at a free-electron laser to directly determine the magnetic dynamics after photo-doping the Mott insulator Sr2IrO4. We find that the non-equilibrium state, 2 ps after the excitation, exhibits strongly suppressed long-range magnetic order, but hosts photo-carriers that induce strong, non-thermal magnetic correlations. These two-dimensional (2D) in-plane Néel correlations recover within a few picoseconds, whereas the three-dimensional (3D) long-range magnetic order restores on a fluence-dependent timescale of a few hundred picoseconds. The marked difference in these two timescales implies that the dimensionality of magnetic correlations is vital for our understanding of ultrafast magnetic dynamics.

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Language(s): eng - English
 Dates: 2015-12-082016-04-072016-05-092016-06
 Publication Status: Published in print
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1038/nmat4641
arXiv: 1604.02439
 Degree: -

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Title: Nature Materials
  Abbreviation : Nat. Mater.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: London, UK : Nature Pub. Group
Pages: - Volume / Issue: 15 (6) Sequence Number: - Start / End Page: 601 - 605 Identifier: ISSN: 1476-1122
CoNE: /journals/resource/111054835734000