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  Optically enhanced coherent transport in YBa2Cu3O6.5 by ultrafast redistribution of interlayer coupling

Hu, W., Kaiser, S., Nicoletti, D., Hunt, C. R., Gierz, I., Hoffmann, M. C., et al. (2014). Optically enhanced coherent transport in YBa2Cu3O6.5 by ultrafast redistribution of interlayer coupling. Nature Materials, 13(7), 705-711. doi:10.1038/nmat3963.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-C31A-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-0BD0-F
Genre: Journal Article

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1308.3204.pdf (Preprint), 5MB
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2013
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© W. Hu et al.

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https://dx.doi.org/10.1038/nmat3963 (Publisher version)
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http://arxiv.org/abs/1308.3204 (Preprint)
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 Creators:
Hu, Wanzheng1, Author              
Kaiser, Stefan1, Author              
Nicoletti, Daniele1, Author              
Hunt, Cassandra R.1, Author              
Gierz, Isabella2, Author              
Hoffmann, Matthias C.1, Author              
Le Tacon, M.3, Author              
Loew, T.3, Author              
Keimer, B.3, Author              
Cavalleri, Andrea1, 4, Author              
Affiliations:
1Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
2Ultrafast Electron Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938295              
3Solid State Spectroscopy, Max Planck Institute for Solid State Research, Max Planck Society, ou_persistent22              
4Department of Physics, Clarendon Laboratory, University of Oxford, ou_persistent22              

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 Abstract: Nonlinear optical excitation of infrared active lattice vibrations has been shown to melt magnetic or orbital orders and to transform insulators into metals. In cuprates, this technique has been used to remove charge stripes and promote superconductivity, acting in a way opposite to static magnetic fields. Here, we show that excitation of large-amplitude apical oxygen distortions in the cuprate superconductor YBa2Cu3O6.5 promotes highly unconventional electronic properties. Below the superconducting transition temperature (Tc = 50 K) inter-bilayer coherence is transiently enhanced at the expense of intra-bilayer coupling. Strikingly, even above Tc a qualitatively similar effect is observed up to room temperature, with transient inter-bilayer coherence emerging from the incoherent ground state and similar transfer of spectral weight from high to low frequency. These observations are compatible with previous reports of an inhomogeneous normal state that retains important properties of a superconductor, in which light may be melting competing orders or dynamically synchronizing the interlayer phase. The transient redistribution of coherence discussed here could lead to new strategies to enhance superconductivity in steady state.

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Language(s): eng - English
 Dates: 2013-10-182014-03-282014-05-112014-07
 Publication Status: Published in print
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: BibTex Citekey: Hu2014705
DOI: 10.1038/nmat3963
arXiv: 1308.3204
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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: 13 (7) Sequence Number: - Start / End Page: 705 - 711 Identifier: ISSN: 1476-1122
CoNE: /journals/resource/111054835734000