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  Imaging momentum-space two-particle correlations at surfaces

Schumann, F. O., Kirschner, J., & Berakdar, J. (2020). Imaging momentum-space two-particle correlations at surfaces. Physica Status Solidi B, 257(7): 1900636. doi:10.1002/pssb.201900636.

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pssb.201900636.pdf (Publisher version), 2MB
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https://doi.org/10.1002/pssb.201900636 (Publisher version)
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 Creators:
Schumann, Frank O.1, Author              
Kirschner, Jürgen1, Author              
Berakdar, Jamal2, Author
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1Max Planck Institute of Microstructure Physics, Max Planck Society, ou_2415691              
2External Organizations, ou_persistent22              

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 Abstract: Photoelectron and electron energy loss spectroscopies have been highly instrumental in revealing the various facets of electronic properties of materials. For a direct insight into two‐particle correlations, a technique is needed that resolves two emitted electrons in coincidence. Herein, an overview on the experimental realization of correlation spectroscopy and the interpretation of the recorded spectra from theory is provided. The relation of the measured spectra to the details of the spin‐, energy‐ and wavevector‐resolved electron–electron interactions is focused upon. To disentangle the contributions of exchange from the charge‐density correlation, positrons instead of electrons are used as projectiles. The short intrinsic time of the Auger decay and the neutralization of He2+ ions near a surface are used to estimate the characteristic timescale for the correlated electron dynamics in metals to be 40–400 attoseconds. The potential of conducting double photoemission studies with pulsed laser‐based light sources is addressed.

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 Dates: 2020-01-23
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: P13888
DOI: 10.1002/pssb.201900636
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Title: Physica Status Solidi B
  Abbreviation : Phys. Status Solidi B
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 257 (7) Sequence Number: 1900636 Start / End Page: - Identifier: ISSN: 0370-1972
CoNE: https://pure.mpg.de/cone/journals/resource/958480240330