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  Direct detection of odd-frequency superconductivity via time- and angle-resolved photoelectron fluctuation spectroscopy

Kornich, V., Schlawin, F., Sentef, M. A., & Trauzettel, B. (2021). Direct detection of odd-frequency superconductivity via time- and angle-resolved photoelectron fluctuation spectroscopy. Physical Review Research, 3: L042034. doi:10.1103/PhysRevResearch.3.L042034.

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PhysRevResearch.3.L042034.pdf (Publisher version), 737KB
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PhysRevResearch.3.L042034.pdf
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2021
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© the Author(s). Published by the American Physical Society
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https://arxiv.org/abs/2106.09446 (Preprint)
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 Creators:
Kornich, V.1, Author
Schlawin, F.2, 3, 4, Author              
Sentef, M. A.3, 5, Author              
Trauzettel, B.1, Author
Affiliations:
1Institut für Theoretische Physik and Astrophysik, Universität Würzburg, ou_persistent22              
2Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938285              
3Center for Free Electron Laser Science (CFEL), ou_persistent22              
4The Hamburg Centre for Ultrafast Imaging, ou_persistent22              
5Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3012828              

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 Abstract: We propose a measurement scheme to directly detect odd-frequency superconductivity via time- and angle-resolved photoelectron fluctuation spectroscopy. The scheme includes two consecutive nonoverlapping probe pulses applied to a superconducting sample. The photoemitted electrons are collected in a momentum-resolved fashion. Correlations between signals with opposite momenta are analyzed. Remarkably, these correlations are directly proportional to the absolute square of the time-ordered anomalous Green's function of the superconductor. This setup allows for the direct detection of the “hidden order parameter” of odd-frequency pairing. We illustrate this general scheme by analyzing the signal for the prototypical case of a two-band superconductor.

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Language(s): eng - English
 Dates: 2021-10-292021-06-172021-11-022021-12-03
 Publication Status: Published online
 Pages: -
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 Rev. Type: Peer
 Identifiers: arXiv: 2106.09446
DOI: 10.1103/PhysRevResearch.3.L042034
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Project name : F.S. acknowledges support from the Cluster of Excellence “Advanced Imaging of Matter” of the Deutsche Forschungsgemeinschaft (DFG)-EXC 2056-Project-ID No. 390715994.
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Title: Physical Review Research
Source Genre: Journal
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Publ. Info: College Park, Maryland, United States : American Physical Society (APS)
Pages: - Volume / Issue: 3 Sequence Number: L042034 Start / End Page: - Identifier: ISSN: 2643-1564
CoNE: https://pure.mpg.de/cone/journals/resource/2643-1564