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  Squeezed Josephson plasmons in driven YBa2Cu3O6+x

Taherian Hosseinabadi, N., Först, M., Liu, A., Fechner, M., Pavicevic, D., von Hoegen, A., et al. (2024). Squeezed Josephson plasmons in driven YBa2Cu3O6+x.

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2401.01115.pdf (Preprint), 2MB
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2401.01115.pdf
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File downloaded from arXiv at 2024-01-04
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https://arxiv.org/abs/2401.01115 (Preprint)
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 Urheber:
Taherian Hosseinabadi, N.1, Autor           
Först, M.1, Autor           
Liu, A.1, Autor           
Fechner, M.1, Autor           
Pavicevic, D.1, Autor           
von Hoegen, A.1, Autor           
Rowe, E.1, Autor           
Liu, Y.2, Autor
Nakata, S.2, Autor
Keimer, B.2, Autor
Demler, E.3, Autor
Michael, M.4, Autor           
Cavalleri, A.1, 5, Autor           
Affiliations:
1Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
2Max Planck Institute for Solid State Research, ou_persistent22              
3Institute for Theoretical Physics, ETH Zurich, ou_persistent22              
4Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
5Department of Physics, University of Oxford, ou_persistent22              

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Schlagwörter: Condensed Matter, Superconductivity, cond-mat.supr-con
 Zusammenfassung: The physics of driven collective modes in quantum materials underpin a number of striking non-equilibrium functional responses, which include enhanced magnetism, ferroelectricity and superconductivity. However, the coherent coupling between multiple modes at once are difficult to capture by single-pump probe (one-dimensional) spectroscopy, and often remain poorly understood. One example is phonon-mediated amplification of Josephson plasmons in YBa2Cu3O6+x, in which at least three normal modes of the solid are coherently mixed as a source of enhanced superconductivity. Here, we go beyond previous pump-probe experiments in this system and acquire two-dimensional frequency maps using pairs of mutually delayed, carrier envelope phase stable mid-infrared pump pulses, combined with measurements of the time-modulated second-order nonlinear optical susceptibility. We find that the driven zone-center phonons amplify coherent pairs of opposite-momentum Josephson plasma polaritons, generating a squeezed state of interlayer phase fluctuations. The squeezed state is a potentially important ingredient in the microscopic physics of photo-induced superconductivity in this and other materials.

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Sprache(n): eng - English
 Datum: 2024-01-02
 Publikationsstatus: Online veröffentlicht
 Seiten: 20
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Keine Begutachtung
 Identifikatoren: arXiv: 2401.01115
 Art des Abschluß: -

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