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  Transient photoinduced ‘hidden’ phase in a manganite

Ichikawa, H., Nozawa, S., Sato, T., Tomita, A., Ichiyanagi, K., Chollet, M., et al. (2011). Transient photoinduced ‘hidden’ phase in a manganite. Nature Materials, 10(2), 101-105. doi:10.1038/nmat2929.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-1A5A-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-1A5B-6
Genre: Journal Article

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http://dx.doi.org/10.1038/nmat2929 (Publisher version)
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 Creators:
Ichikawa, Hirohiko1, Author
Nozawa, Shunsuke1, 2, Author
Sato, Tokushi1, 2, 3, Author
Tomita, Ayana1, 3, Author
Ichiyanagi, Kouhei1, Author
Chollet, Matthieu3, Author
Guerin, Laurent1, Author
Dean, Nicky4, Author
Cavalleri, Andrea4, 5, 6, Author              
Adachi, Shin-ichi1, 2, Author
Arima, Taka-hisa7, Author
Sawa, Hiroshi2, Author
Ogimoto, Yasushi8, Author
Nakamura, Masao8, Author
Tamaki, Ryo8, Author
Miyano, Kenjiro8, Author
Koshihara, Shin-ya1, 3, Author
Affiliations:
1JST, ERATO, Tsukuba 305-0801, Japan, ou_persistent22              
2Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba 305-0801, Japan, ou_persistent22              
3JST, CREST & Department of Materials Science, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan, ou_persistent22              
4Department of Physics, Clarendon Laboratory, University of Oxford, ou_persistent22              
5Condensed Matter Dynamics Division, Max Planck Research Department for Structural Dynamics, Department of Physics, University of Hamburg, External Organizations, ou_2173637              
6Center For Free Electron Laser Science, Notkestraße 85, 22607 Hamburg, Germany, ou_persistent22              
7Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan, ou_persistent22              
8JST, CREST & Research Center for Advanced Science and Technology, University of Tokyo, Tokyo 153-8904, Japan, ou_persistent22              

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 Abstract: Photoinduced phase transitions are of special interest in condensed matter physics because they can be used to change complex macroscopic material properties on the ultrafast timescale. Cooperative interactions between microscopic degrees of freedom greatly enhance the number and nature of accessible states, making it possible to switch electronic, magnetic or structural properties in new ways. Photons with high energies, of the order of electron volts, in particular are able to access electronic states that may differ greatly from states produced with stimuli close to equilibrium. In this study we report the photoinduced change in the lattice structure of a charge and orbitally ordered Nd0.5Sr0.5MnO3 thin film using picosecond time-resolved X-ray diffraction. The photoinduced state is structurally ordered, homogeneous, metastable and has crystallographic parameters different from any thermodynamically accessible state. A femtosecond time-resolved spectroscopic study shows the formation of an electronic gap in this state. In addition, the threshold-like behaviour and high efficiency in photo-generation yield of this gapped state highlight the important role of cooperative interactions in the formation process. These combined observations point towards a ‘hidden insulating phase’ distinct from that found in the hitherto known phase diagram.

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Language(s): eng - English
 Dates: 2010-01-282010-11-192011-01-162011-02
 Publication Status: Published in print
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1038/nmat2929
 Degree: -

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Title: Nature Materials
  Abbreviation : Nat. Mater.
Source Genre: Journal
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Publ. Info: London, UK : Nature Pub. Group
Pages: - Volume / Issue: 10 (2) Sequence Number: - Start / End Page: 101 - 105 Identifier: ISSN: 1476-1122
CoNE: https://pure.mpg.de/cone/journals/resource/111054835734000