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  Optically induced superconductivity in striped La2‐xBaxCuO4 by polarization‐selective excitation in the near infrared

Nicoletti, D., Casandruc, E., Laplace, Y., Khanna, V., Hunt, C. R., Kaiser, S., et al. (2014). Optically induced superconductivity in striped La2‐xBaxCuO4 by polarization‐selective excitation in the near infrared. Physical Review B, 90(10): 100503(R). doi:10.1103/PhysRevB.90.100503.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0023-CF6D-3 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-DBF7-B
Genre: Journal Article

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PhysRevB.90.100503.pdf (Publisher version), 647KB
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PhysRevB.90.100503.pdf
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2014
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http://dx.doi.org/10.1103/PhysRevB.90.100503 (Publisher version)
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http://arxiv.org/abs/1404.6796 (Preprint)
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 Creators:
Nicoletti, Daniele1, Author              
Casandruc, Eliza1, 2, Author              
Laplace, Yannis1, Author              
Khanna, Vikaran1, 3, 4, Author              
Hunt, Cassandra R.1, 5, Author              
Kaiser, Stefan1, Author              
Dhesi, S. S.3, Author
Gu, G. D.6, Author
Hill, J. P.6, Author
Cavalleri, Andrea1, 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              
2International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266714              
3Department of Physics, Clarendon Laboratory, University of Oxford, ou_persistent22              
4Diamond Light Source, Chilton, Didcot, Oxfordshire, United Kingdom, ou_persistent22              
5Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA, ou_persistent22              
6Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York, USA, ou_persistent22              

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Free keywords: PACS numbers: 74.25.Gz, 74.40.Gh, 74.62.Yb, 78.47.jg
 Abstract: We show that superconducting interlayer coupling, which coexists with and is depressed by stripe order in La1.885Ba0.115CuO4, can be enhanced by excitation with near-infrared laser pulses. For temperatures lower than Tc=13 K, we observe a blue shift of the equilibrium Josephson plasma resonance, detected by terahertz-frequency reflectivity measurements. Key to this measurement is the ability to probe the optical properties at frequencies as low as 150 GHz, detecting the weak interlayer coupling strengths. For T>Tc a similar plasma resonance, absent at equilibrium, is induced up to the spin-ordering temperature TSO≃40 K. These effects are reminiscent but qualitatively different from the light-induced superconductivity observed by resonant phonon excitation in La1.675Eu0.2Sr0.125CuO6.5. Importantly, enhancement of the below-Tc interlayer coupling and its appearance above Tc are preferentially achieved when the near-infrared pump light is polarized perpendicular to the superconducting planes, likely due to more effective melting of stripe order and the less effective excitation of quasiparticles from the Cooper pair condensate when compared to in-plane excitation.

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Language(s): eng - English
 Dates: 2014-08-272014-04-272014-09-102014-09-01
 Publication Status: Published in print
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevB.90.100503
BibTex Citekey: PhysRevB.90.100503
arXiv: 1404.6796
 Degree: -

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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 90 (10) Sequence Number: 100503(R) Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008