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  Magnetic-Field Tuning of Light-Induced Superconductivity in Striped La2−xBaxCuO4

Nicoletti, D., Fu, D., Mehio, O., Moore, S., Disa, A., Gu, G. D., et al. (2018). Magnetic-Field Tuning of Light-Induced Superconductivity in Striped La2−xBaxCuO4. Physical Review Letters, 121(26): 267003. doi:10.1103/PhysRevLett.121.267003.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-E612-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-8FDF-1
Genre: Journal Article

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PhysRevLett.121.267003.pdf (Publisher version), 2MB
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https://arxiv.org/abs/1803.05420 (Preprint)
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 Creators:
Nicoletti, D.1, Author              
Fu, D.1, Author              
Mehio, O.1, Author
Moore, S.1, Author
Disa, A.1, Author              
Gu, G. D.2, Author
Cavalleri, A.1, 3, 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              
2Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY, ou_persistent22              
3Department of Physics, Clarendon Laboratory, University of Oxford, Oxford, ou_persistent22              

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 Abstract: Optical excitation of stripe-ordered La2−xBaxCuO4 has been shown to transiently enhance superconducting tunneling between the CuO2 planes. This effect was revealed by a blue-shift, or by the appearance of a Josephson Plasma Resonance in the terahertz-frequency optical properties. Here, we show that this photo-induced state can be strengthened by the application of high external magnetic fields oriented along the c-axis. For a 7-Tesla field, we observe up to a ten-fold enhancement in the transient interlayer phase correlation length, accompanied by a two-fold increase in the relaxation time of the photo-induced state. These observations are highly surprising, since static magnetic fields suppress interlayer Josephson tunneling and stabilize stripe order at equilibrium. We interpret our data as an indication that optically-enhanced interlayer coupling in La2−xBaxCuO4 does not originate from a strengthening of the equilibrium superconductor that competes with stripes, as previously hypothesized. Rather, these results suggest that the photo-induced state may emerge from activated tunneling between optically-excited pair-density-waves in adjacent planes.

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Language(s): eng - English
 Dates: 2018-03-062018-12-272018-12-27
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: arXiv: 1803.05420
DOI: 10.1103/PhysRevLett.121.267003
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 121 (26) Sequence Number: 267003 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1