Spin- and time-resolved photoelectron spectroscopy and diffraction studies using time-of-flight momentum microscopes
- Publikationstyp:
- Zeitschriftenaufsatz
- Metadaten:
-
- Autoren
- Gerd Schoenhense
- Hans-Joachim Elmers
- Autoren-URL
- https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000749963400001&DestLinkType=FullRecord&DestApp=WOS_CPL
- DOI
- 10.1116/6.0001500
- eISSN
- 1520-8559
- Externe Identifier
- Clarivate Analytics Document Solution ID: YR4LJ
- ISSN
- 0734-2101
- Ausgabe der Veröffentlichung
- 2
- Zeitschrift
- JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
- Artikelnummer
- ARTN 020802
- Datum der Veröffentlichung
- 2022
- Status
- Published
- Titel
- Spin- and time-resolved photoelectron spectroscopy and diffraction studies using time-of-flight momentum microscopes
- Sub types
- Review
- Ausgabe der Zeitschrift
- 40
Datenquelle: Web of Science (Lite)
- Andere Metadatenquellen:
-
- Abstract
- <jats:p>Momentum microscopy (MM) is a novel way of performing angle-resolved photoelectron spectroscopy (ARPES). Combined with time-of-flight (ToF) energy recording, its high degree of parallelization is advantageous for photon-hungry experiments like ARPES at x-ray energies, spin-resolved and time-resolved ARPES. This article introduces the technique of ToF-MM and illustrates its performance by selected examples obtained in different spectral ranges. In a multidimensional view of the photoemission process, spectral density function ρ(k,EB), spin polarization P(k,EB), and related quantities of circular dichroism in the angular distribution (CDAD) are part of the “complete experiment,” a concept adopted from atomic photoemission. We show examples of spin-resolved valence-band mapping in the UV and VUV, and the soft- and hard-x-ray range. Spin mapping of the Heusler compounds such as Co2MnGa and Co2Fe0.4Mn0.6Si at hν = 6 eV proves that the second compound is a half-metallic ferromagnet. Analysis of the Tamm state on Re(0001) using VUV-excitation reveals a Rashba-type spin texture. Bulk band structure including Fermi surface, Fermi-velocity distribution vF(k,EF), full CDAD texture, and spin signature of W(110) have been derived via tomographic mapping with soft x-rays. Hard x rays enable accessing large k||-regions so that the final-state sphere crosses many Brillouin zones in k-space with different kz’s. At hν = 5.3 keV, this fast 4D mapping mode (at a fixed hν) revealed the temperature dependence of the Fermi surface of the Kondo system YbRh2Si2. Probing the true bulk spin polarization of Fe3O4 at hν = 5 keV proved its half-metallic nature. The emerging method of ToF-MM with fs x-ray pulses from free-electron lasers enables simultaneous valence, core-level, and photoelectron diffraction measurements in the ultrafast regime.</jats:p>
- Autoren
- Gerd Schönhense
- Hans-Joachim Elmers
- DOI
- 10.1116/6.0001500
- eISSN
- 1520-8559
- ISSN
- 0734-2101
- Ausgabe der Veröffentlichung
- 2
- Zeitschrift
- Journal of Vacuum Science & Technology A
- Sprache
- en
- Online publication date
- 2022
- Datum der Veröffentlichung
- 2022
- Status
- Published
- Herausgeber
- American Vacuum Society
- Herausgeber URL
- http://dx.doi.org/10.1116/6.0001500
- Datum der Datenerfassung
- 2024
- Titel
- Spin- and time-resolved photoelectron spectroscopy and diffraction studies using time-of-flight momentum microscopes
- Ausgabe der Zeitschrift
- 40
Datenquelle: Crossref
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