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  Coherent emission from surface Josephson plasmons in striped cuprates

Nicoletti, D., Buzzi, M., Fechner, M., Dolgirev, P. E., Michael, M., Curtis, J. B., et al. (2022). Coherent emission from surface Josephson plasmons in striped cuprates. Proceedings of the National Academy of Sciences of the United States of America, 119(39): e2211670119. doi:10.1073/pnas.2211670119.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0009-8DA3-0 Version Permalink: https://hdl.handle.net/21.11116/0000-000B-F62C-F
Genre: Journal Article

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 Creators:
Nicoletti, D.1, Author           
Buzzi, M.1, Author           
Fechner, M.1, Author           
Dolgirev, P. E.2, Author
Michael, M.2, 3, Author           
Curtis, J. B.2, 4, Author
Demler, E.5, Author
Gu, G. D.6, Author
Cavalleri, A.1, 7, 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              
2Department of Physics, Harvard University, ou_persistent22              
3Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
4John A. Paulson School of Engineering and Applied Sciences, Harvard University, ou_persistent22              
5Institute for Theoretical Physics, ETH Zurich, ou_persistent22              
6Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, ou_persistent22              
7Department of Physics, Clarendon Laboratory, University of Oxford, ou_persistent22              

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Free keywords: terahertz emission; cuprates; superconductivity; stripes; surface Josephson plasmons
 Abstract: The interplay between charge order and superconductivity remains one of the central themes of research in quantum materials. In the case of cuprates, the coupling between striped charge fluctuations and local electromagnetic fields is especially important, as it affects transport properties, coherence, and dimensionality of superconducting correlations. Here, we study the emission of coherent terahertz radiation in single-layer cuprates of the La2-xBaxCuO4 family, for which this effect is expected to be forbidden by symmetry. We find that emission vanishes for compounds in which the stripes are quasi-static but is activated when c-axis inversion symmetry is broken by incommensurate or fluctuating charge stripes, such as in La1.905Ba0.095CuO4 and in La1.845Ba0.155CuO4. In this case, terahertz radiation is emitted by surface Josephson plasmons, which are generally dark modes, but couple to free space electromagnetic radiation because of the stripe modulation.

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Language(s): eng - English
 Dates: 2022-07-082022-08-052022-09-202022-09-27
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2111.14904
DOI: 10.1073/pnas.2211670119
 Degree: -

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Project name : -
Grant ID : 319286
Funding program : Funding Programme 7 (FP7)
Funding organization : European Commission (EC)
Project name : The research leading to these results received funding from the European Research Council under the European Union’s Seventh Framework Programme (FP7/2007-2013)/ERC Grant Agreement No. 319286 (QMAC). We acknowledge support from the Deutsche Forschungsgemeinschaft (German Research Foundation) via the excellence cluster “CUI: Advanced Imaging of Matter” (EXC 2056, project ID 390715994) and the priority program SFB925 (project ID 170620586). E.D. acknowledges support from AFOSR-MURI: Photonic Quantum Matter award FA95501610323, DARPA DRINQS, the ARO grant “Control of Many-Body States Using Strong Coherent Light-Matter Coupling in Terahertz Cavities.” J.B.C. is supported by the Quantum Science Center, a National Quantum Information Science Research Center of the US Department of Energy, and by the Harvard Quantum Initiative. J.B.C. also acknowledges hospitality from the Max Planck Institute for Structure and Dynamics of Matter (Hamburg), and ETH Zürich Institute for Theoretical Physics. Work at Brookhaven is supported by the Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, US Department of Energy, under Contract No. DE-SC0012704.
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Title: Proceedings of the National Academy of Sciences of the United States of America
  Other : PNAS
  Other : Proceedings of the National Academy of Sciences of the USA
  Abbreviation : Proc. Natl. Acad. Sci. U. S. A.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Washington, D.C. : National Academy of Sciences
Pages: - Volume / Issue: 119 (39) Sequence Number: e2211670119 Start / End Page: - Identifier: ISSN: 0027-8424
CoNE: https://pure.mpg.de/cone/journals/resource/954925427230