High-resolution hard-x-ray photoelectron diffraction in a momentum microscope—the model case of graphite
Hard x-ray photoelectron diffraction (hXPD) patterns recorded with a momentum microscope with high k -resolution (0.025 Å ^−1 equivalent to an angular resolution of 0.034° at 7 keV) reveal unprecedented rich fine structure. We have studied hXPD of the C 1s core level in the prototypical low-Z materi...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2019-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/ab51fe |
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| author | O Fedchenko A Winkelmann K Medjanik S Babenkov D Vasilyev S Chernov C Schlueter A Gloskovskii Yu Matveyev W Drube B Schönhense H J Elmers G Schönhense |
| author_facet | O Fedchenko A Winkelmann K Medjanik S Babenkov D Vasilyev S Chernov C Schlueter A Gloskovskii Yu Matveyev W Drube B Schönhense H J Elmers G Schönhense |
| author_sort | O Fedchenko |
| collection | DOAJ |
| description | Hard x-ray photoelectron diffraction (hXPD) patterns recorded with a momentum microscope with high k -resolution (0.025 Å ^−1 equivalent to an angular resolution of 0.034° at 7 keV) reveal unprecedented rich fine structure. We have studied hXPD of the C 1s core level in the prototypical low-Z material Graphite at 20 photon energies between 2.8 and 7.3 keV. Sharp bright and dark lines shift with energy; regions of Kikuchi band crossings near zone axis exhibit a filigree structure which varies rapidly with energy. Calculations based on the Bloch wave approach to electron diffraction from lattice planes show excellent agreement with the experimental results throughout the entire energy range. The main Kikuchi bands in the [001] zone axis appear fixed on the momentum scale with a width of the corresponding reciprocal lattice vector, allowing to reconstruct the size of the projected Brillouin zone. The newly developed high-energy k -microscope allows full-field imaging of ( k _x , k _y )-distributions in large k -fields (up to >22 Å ^−1 dia.) and time-of-flight energy recording. |
| first_indexed | 2024-03-12T16:32:47Z |
| format | Article |
| id | doaj.art-c024228a8382477196344f43346baac6 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:32:47Z |
| publishDate | 2019-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-c024228a8382477196344f43346baac62023-08-08T15:24:55ZengIOP PublishingNew Journal of Physics1367-26302019-01-01211111303110.1088/1367-2630/ab51feHigh-resolution hard-x-ray photoelectron diffraction in a momentum microscope—the model case of graphiteO Fedchenko0https://orcid.org/0000-0002-6159-7934A Winkelmann1https://orcid.org/0000-0002-6534-693XK Medjanik2S Babenkov3D Vasilyev4https://orcid.org/0000-0003-2870-3851S Chernov5C Schlueter6A Gloskovskii7Yu Matveyev8W Drube9B Schönhense10H J Elmers11G Schönhense12Institut für Physik, Johannes Gutenberg-Universität , Mainz, GermanyLaser Zentrum Hannover e.V, Hannover, GermanyInstitut für Physik, Johannes Gutenberg-Universität , Mainz, GermanyInstitut für Physik, Johannes Gutenberg-Universität , Mainz, GermanyInstitut für Physik, Johannes Gutenberg-Universität , Mainz, GermanyInstitut für Physik, Johannes Gutenberg-Universität , Mainz, GermanyDeutsches Elektronen-Synchrotron DESY, Hamburg, GermanyDeutsches Elektronen-Synchrotron DESY, Hamburg, GermanyDeutsches Elektronen-Synchrotron DESY, Hamburg, GermanyDeutsches Elektronen-Synchrotron DESY, Hamburg, GermanyDept. of Bioengineering, Imperial College, London, United KingdomInstitut für Physik, Johannes Gutenberg-Universität , Mainz, GermanyInstitut für Physik, Johannes Gutenberg-Universität , Mainz, GermanyHard x-ray photoelectron diffraction (hXPD) patterns recorded with a momentum microscope with high k -resolution (0.025 Å ^−1 equivalent to an angular resolution of 0.034° at 7 keV) reveal unprecedented rich fine structure. We have studied hXPD of the C 1s core level in the prototypical low-Z material Graphite at 20 photon energies between 2.8 and 7.3 keV. Sharp bright and dark lines shift with energy; regions of Kikuchi band crossings near zone axis exhibit a filigree structure which varies rapidly with energy. Calculations based on the Bloch wave approach to electron diffraction from lattice planes show excellent agreement with the experimental results throughout the entire energy range. The main Kikuchi bands in the [001] zone axis appear fixed on the momentum scale with a width of the corresponding reciprocal lattice vector, allowing to reconstruct the size of the projected Brillouin zone. The newly developed high-energy k -microscope allows full-field imaging of ( k _x , k _y )-distributions in large k -fields (up to >22 Å ^−1 dia.) and time-of-flight energy recording.https://doi.org/10.1088/1367-2630/ab51fephotoemissionhard x-raysphotoelectron diffractiongraphitetime-of-flight (ToF) momentum microscopy |
| spellingShingle | O Fedchenko A Winkelmann K Medjanik S Babenkov D Vasilyev S Chernov C Schlueter A Gloskovskii Yu Matveyev W Drube B Schönhense H J Elmers G Schönhense High-resolution hard-x-ray photoelectron diffraction in a momentum microscope—the model case of graphite New Journal of Physics photoemission hard x-rays photoelectron diffraction graphite time-of-flight (ToF) momentum microscopy |
| title | High-resolution hard-x-ray photoelectron diffraction in a momentum microscope—the model case of graphite |
| title_full | High-resolution hard-x-ray photoelectron diffraction in a momentum microscope—the model case of graphite |
| title_fullStr | High-resolution hard-x-ray photoelectron diffraction in a momentum microscope—the model case of graphite |
| title_full_unstemmed | High-resolution hard-x-ray photoelectron diffraction in a momentum microscope—the model case of graphite |
| title_short | High-resolution hard-x-ray photoelectron diffraction in a momentum microscope—the model case of graphite |
| title_sort | high resolution hard x ray photoelectron diffraction in a momentum microscope the model case of graphite |
| topic | photoemission hard x-rays photoelectron diffraction graphite time-of-flight (ToF) momentum microscopy |
| url | https://doi.org/10.1088/1367-2630/ab51fe |
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