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  Periodic dynamics in superconductors induced by an impulsive optical quench

Dolgirev, P. E., Zong, A., Michael, M. H., Curtis, J. B., Podolsky, D., Cavalleri, A., et al. (2022). Periodic dynamics in superconductors induced by an impulsive optical quench. Communications Physics, 5: 234. doi:10.1038/s42005-022-01007-w.

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https://arxiv.org/abs/2104.07181 (Preprint)
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 Urheber:
Dolgirev, P. E.1, Autor
Zong, A.2, Autor
Michael, M. H.1, Autor
Curtis, J. B.1, 3, Autor
Podolsky, D.4, Autor
Cavalleri, A.5, 6, Autor           
Demler, E.7, Autor
Affiliations:
1Department of Physics, Harvard University, ou_persistent22              
2University of California at Berkeley, Department of Chemistry, ou_persistent22              
3John A. Paulson School of Engineering and Applied Sciences, Harvard University, ou_persistent22              
4Physics Department, Technion, ou_persistent22              
5Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
6Clarendon Laboratory, University of Oxford, ou_persistent22              
7Institute for Theoretical Physics, ETH Zurich, ou_persistent22              

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 Zusammenfassung: A number of experiments have evidenced signatures of enhanced superconducting correlations after photoexcitation. Initially, these experiments were interpreted as resulting from quasi-static changes in the Hamiltonian parameters, for example, due to lattice deformations or melting of competing phases. Yet, several recent observations indicate that these conjectures are either incorrect or do not capture all the observed phenomena, which include reflectivity exceeding unity, large shifts of Josephson plasmon edges, and appearance of new peaks in terahertz reflectivity. These observations can be explained from the perspective of a Floquet theory involving a periodic drive of system parameters, but the origin of the underlying oscillations remains unclear. In this paper, we demonstrate that following incoherent photoexcitation, long-lived oscillations are generally expected in superconductors with low-energy Josephson plasmons, such as in cuprates or fullerene superconductor K3C60. These oscillations arise from the parametric generation of plasmon pairs due to pump-induced perturbation of the superconducting order parameter. We show that this bi-plasmon response can persist even above the transition temperature as long as strong superconducting fluctuations are present. Our analysis offers a robust framework to understand light-induced superconducting behavior, and the predicted bi-plasmon oscillations can be directly detected using available experimental techniques.

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Sprache(n): eng - English
 Datum: 2021-08-312022-08-302022-09-22
 Publikationsstatus: Online veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: arXiv: 2104.07181
DOI: 10.1038/s42005-022-01007-w
 Art des Abschluß: -

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Projektname : -
Grant ID : 319286
Förderprogramm : Funding Programme 7 (FP7)
Förderorganisation : European Commission (EC)
Projektname : The authors would like to thank M. Mitrano, L. Glazman, I. Klich, B. Halperin, D. Nicoletti, A. von Hoegen, M. Fechner, M. Först, P. Narang, I. Esterlis, and S. Chatterjee for stimulating discussions. P.E.D., M.H.M., and E.D. were supported by Harvard-MIT CUA, AFOSR-MURI: Photonic Quantum Matter award FA95501610323, Harvard Quantum Initiative. A.Z. acknowledges support from the Miller Institute for Basic Research in Science. J.B.C. is an HQI Prize Postdoctoral Fellow and gratefully acknowledges support from the Harvard Quantum Initiative. D.P. acknowledges financial support by the Israel Science Foundation (Grant No. 1803/18). A.C.’s work was funded in part by the European Research Council under the European Union’s Seventh Framework Programme (FP7/2007-2013)/ERC (grant agreement no. 319286 (QMAC)) and by the Cluster of Excellence ‘CUI: Advanced Imaging of Matter’ of the Deutsche Forschungsgemeinschaft (DFG), EXC 2056, project ID 390715994.
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Quelle 1

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Titel: Communications Physics
Genre der Quelle: Zeitschrift
 Urheber:
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Ort, Verlag, Ausgabe: London : Nature Publishing Group
Seiten: - Band / Heft: 5 Artikelnummer: 234 Start- / Endseite: - Identifikator: ISSN: 2399-3650
CoNE: https://pure.mpg.de/cone/journals/resource/2399-3650