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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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Item Permalink: https://hdl.handle.net/21.11116/0000-0008-BA6E-C Version Permalink: https://hdl.handle.net/21.11116/0000-000B-F1AC-3
Genre: Journal Article

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PhysRevResearch.3.L042034.pdf (Publisher version), 737KB
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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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https://dx.doi.org/10.1103/PhysRevResearch.3.L042034 (Publisher version)
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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
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 Rev. Type: Peer
 Identifiers: arXiv: 2106.09446
DOI: 10.1103/PhysRevResearch.3.L042034
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Project name : We acknowledge useful discussions with A. Balatsky, H. Bentmann, T. Heikkilä, K. Nagaev, and L. Rettig. This work was supported by the DFG (Grants No. SPP1666 and No. SFB1170 “ToCoTronics”), the Würzburg-Dresden Cluster of Excellence ct.qmat, EXC2147, Project-ID No. 390858490, and the Elitenetzwerk Bayern Graduate School on “Topological Insulators.” M.A.S. acknowledges financial support through the DFG Emmy Noether Program (Grant No. SE 2558/2). 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