Restoring interlayer Josephson coupling in La1.885Ba0.115CuO4 by charge 
transfer melting of stripe order

Khanna, Vikaran; Mankowsky, Roman; Petrich, Michaela; Bromberger, Hubertus; Cavill, S. A.; Möhr-Vorobeva, E.; Nicoletti, Daniele; Laplace, Yannis; Gu, G. D.; Hill, J. P.; Först, Michael; Cavalleri, Andrea; Dhesi, S. S.

doi:10.1103/PhysRevB.93.224522

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Restoring interlayer Josephson coupling in La_1.885Ba_0.115CuO₄ by charge transfer melting of stripe order

MPS-Authors

/persons/resource/persons133779

Khanna, Vikaran
Diamond Light Source, Chilton, Didcot, OX11 0DE, United Kingdom;
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Department of Physics, Clarendon Laboratory, University of Oxford, Oxford, OX1 3PU, United Kingdom;

/persons/resource/persons133845

Mankowsky, Roman
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science, 22761 Hamburg, Germany;

/persons/resource/persons196954

Petrich, Michaela
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science, 22761 Hamburg, Germany;

/persons/resource/persons133777

Bromberger, Hubertus
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science, 22761 Hamburg, Germany;

/persons/resource/persons133789

Nicoletti, Daniele
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science, 22761 Hamburg, Germany;

/persons/resource/persons133815

Laplace, Yannis
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science, 22761 Hamburg, Germany;

/persons/resource/persons133775

Först, Michael
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science, 22761 Hamburg, Germany;

/persons/resource/persons133811

Cavalleri, Andrea
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Department of Physics, Clarendon Laboratory, University of Oxford, Oxford, OX1 3PU, United Kingdom;
Center for Free-Electron Laser Science, 22761 Hamburg, Germany;

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http://dx.doi.org/10.1103/PhysRevB.93.224522
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PhysRevB.93.224522.pdf
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Citation

Khanna, V., Mankowsky, R., Petrich, M., Bromberger, H., Cavill, S. A., Möhr-Vorobeva, E., et al. (2016). Restoring interlayer Josephson coupling in La_1.885Ba_0.115CuO₄ by charge transfer melting of stripe order. Physical Review B, 93(22): 224522. doi:10.1103/PhysRevB.93.224522.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002A-F52A-9

Abstract

We show that disruption of charge-density-wave (stripe) order by charge transfer excitation, enhances the superconducting phase rigidity in La_1.885Ba_0.115CuO₄. Time-resolved resonant soft x-ray diffraction demonstrates that charge order melting is prompt following near-infrared photoexcitation whereas the crystal structure remains intact for moderate fluences. THz time-domain spectroscopy reveals that, for the first 2 ps following photoexcitation, a new Josephson plasma resonance edge, at higher frequency with respect to the equilibrium edge, is induced indicating enhanced superconducting interlayer coupling. The fluence dependence of the charge-order melting and the enhanced superconducting interlayer coupling are correlated with a saturation limit of ∼ 0.5 mJ/cm². Using a combination of x-ray and optical spectroscopies we establish a hierarchy of timescales between enhanced superconductivity, melting of charge order, and rearrangement of the crystal structure.