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  Nonlinear lattice dynamics as a basis for enhanced superconductivity in YBa2Cu3O6.5

Mankowsky, R., Subedi, A., Först, M., Mariager, S. O., Chollet, M., Lemke, H. T., et al. (2014). Nonlinear lattice dynamics as a basis for enhanced superconductivity in YBa2Cu3O6.5. Nature, 516(7529), 71-73. doi:10.1038/nature13875.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-BE57-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-0BCE-6
Genre: Journal Article

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1405.2266.pdf (Preprint), 6MB
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2014
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© R. Mankowsky et al.

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https://dx.doi.org/10.1038/nature13875 (Publisher version)
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http://arxiv.org/abs/1405.2266 (Preprint)
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 Creators:
Mankowsky, Roman1, 2, 3, Author              
Subedi, Alaska3, 4, 5, Author              
Först, Michael1, 3, Author              
Mariager, S. O.6, Author
Chollet, M.7, Author
Lemke, H. T.7, Author
Robinson, J. S.7, Author
Glownia, J. M.7, Author
Minitti, M. P.7, Author
Frano, A.8, Author
Fechner, M.9, Author
Spaldin, N. A.9, Author
Loew, T.8, Author
Keimer, B.8, Author
Georges, A.5, 10, 11, Author
Cavalleri, Andrea1, 2, 3, 12, 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              
2University of Hamburg, 22761 Hamburg, Germany, ou_persistent22              
3Center for Free-Electron Laser Science (CFEL), 22761 Hamburg, Germany, ou_persistent22              
4Theory of Complex Materials, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2074318              
5Centre de Physique Théorique, École Polytechnique, CNRS, 91128 Palaiseau Cedex, France, ou_persistent22              
6Swiss Light Source, Paul Scherrer Institut, 5232 Villigen, Switzerland, ou_persistent22              
7Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, Menlo Park 94025, California, USA, ou_persistent22              
8Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany, ou_persistent22              
9Materials Theory, Eidgenössische Technische Hochschule Zürich, 8093 Zürich, Switzerland, ou_persistent22              
10Collège de France, 11 place Marcelin Berthelot, 75005 Paris, France, ou_persistent22              
11Département de Physique de la Matière Condensée (MaNEP), Université de Genève, 1211 Genève, Switzerland, ou_persistent22              
12Department of Physics, University of Oxford, Clarendon Laboratory, Oxford OX1 3PU, UK, ou_persistent22              

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Free keywords: Superconducting properties and materials; Structure of solids and liquids
 Abstract: Terahertz-frequency optical pulses can resonantly drive selected vibrational modes in solids and deform their crystal structures. In complex oxides, this method has been used to melt electronic order, drive insulator-to-metal transitions and induce superconductivity. Strikingly, coherent interlayer transport strongly reminiscent of superconductivity can be transiently induced up to room temperature (300 kelvin) in YBa2Cu3O6+x. Here we report the crystal structure of this exotic non-equilibrium state, determined by femtosecond X-ray diffraction and ab initio density functional theory calculations. We find that nonlinear lattice excitation in normal-state YBa2Cu3O6+x at above the transition temperature of 52 kelvin causes a simultaneous increase and decrease in the Cu–O2 intra-bilayer and, respectively, inter-bilayer distances, accompanied by anisotropic changes in the in-plane O–Cu–O bond buckling. Density functional theory calculations indicate that these motions cause drastic changes in the electronic structure. Among these, the enhancement in the dx2-y2 character of the in-plane electronic structure is likely to favour superconductivity.

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Language(s): eng - English
 Dates: 2014-04-252014-09-192014-12-032014-12-04
 Publication Status: Published in print
 Pages: 13
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1038/nature13875
arXiv: 1405.2266
 Degree: -

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Title: Nature
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 516 (7529) Sequence Number: - Start / End Page: 71 - 73 Identifier: ISSN: 0028-0836
CoNE: /journals/resource/954925427238