Spin-filtered time-of-flight k-space microscopy of Ir - Towards the "complete" photoemission experiment

Publikationstyp:
Zeitschriftenaufsatz
Metadaten:
Autoren
  • G Schoenhense
  • K Medjanik
  • S Chernov
  • D Kutnyakhov
  • O Fedchenko
  • M Ellguth
  • D Vasilyev
  • A Zaporozhchenko-Zymakova
  • D Panzer
  • A Oelsner
  • C Tusche
  • B Schonhense
  • J Braun
  • J Minar
  • H Ebert
  • J Viefhaus
  • W Wurth
  • HJ Elmers
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000415578200005&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1016/j.ultramic.2017.06.025
eISSN
1879-2723
Externe Identifier
  • Clarivate Analytics Document Solution ID: FM9HS
  • PubMed Identifier: 28705441
ISSN
0304-3991
Zeitschrift
ULTRAMICROSCOPY
Paginierung
19 - 29
Datum der Veröffentlichung
2017
Status
Published
Titel
Spin-filtered time-of-flight <i>k</i>-space microscopy of Ir - Towards the "complete" photoemission experiment
Sub types
  • Article
  • Proceedings Paper
Ausgabe der Zeitschrift
183

Datenquelle: Web of Science (Lite)

Andere Metadatenquellen:
Autoren
  • G Schönhense
  • K Medjanik
  • S Chernov
  • D Kutnyakhov
  • O Fedchenko
  • M Ellguth
  • D Vasilyev
  • A Zaporozhchenko-Zymaková
  • D Panzer
  • A Oelsner
  • C Tusche
  • B Schönhense
  • J Braun
  • J Minár
  • H Ebert
  • J Viefhaus
  • W Wurth
  • HJ Elmers
DOI
10.1016/j.ultramic.2017.06.025
ISSN
0304-3991
Zeitschrift
Ultramicroscopy
Sprache
en
Paginierung
19 - 29
Datum der Veröffentlichung
2017
Status
Published
Herausgeber
Elsevier BV
Herausgeber URL
http://dx.doi.org/10.1016/j.ultramic.2017.06.025
Datum der Datenerfassung
2018
Titel
Spin-filtered time-of-flight k-space microscopy of Ir – Towards the “complete” photoemission experiment
Ausgabe der Zeitschrift
183

Datenquelle: Crossref

Abstract
The combination of momentum microscopy (high resolution imaging of the Fourier plane) with an imaging spin filter has recently set a benchmark in k-resolution and spin-detection efficiency. Here we show that the degree of parallelization can be further increased by time-of-flight energy recording. On the quest towards maximum information (in earlier work termed "complete" photoemission experiment) we have studied the prototypical high-Z fcc metal iridium. Large partial bandgaps and strong spin-orbit interaction lead to a sequence of spin-polarized surface resonances. Soft X-rays give access to the 4D spectral density function ρ (E<sub>B</sub>,k<sub>x</sub>,k<sub>y</sub>,k<sub>z</sub>) weighted by the photoemission cross section. The Fermi surface and all other energy isosurfaces, Fermi velocity distribution v<sub>F</sub>(k<sub>F</sub>), electron or hole conductivity, effective mass and inner potential can be obtained from the multi-dimensional array ρ by simple algorithms. Polarized light reveals the linear and circular dichroism texture in a simple manner and an imaging spin filter exposes the spin texture. One-step photoemission calculations are in fair agreement with experiment. Comparison of the Bloch spectral function with photoemission calculations uncovers that the observed high spin polarization of photoelectrons from bulk bands originates from the photoemission step and is not present in the initial state.
Addresses
  • Institut für Physik, Johannes Gutenberg-Universität, Staudingerweg 7, 55099 Mainz, Germany. Electronic address: schoenhe@uni-mainz.de.
Autoren
  • G Schönhense
  • K Medjanik
  • S Chernov
  • D Kutnyakhov
  • O Fedchenko
  • M Ellguth
  • D Vasilyev
  • A Zaporozhchenko-Zymaková
  • D Panzer
  • A Oelsner
  • C Tusche
  • B Schönhense
  • J Braun
  • J Minár
  • H Ebert
  • J Viefhaus
  • W Wurth
  • HJ Elmers
DOI
10.1016/j.ultramic.2017.06.025
eISSN
1879-2723
Externe Identifier
  • PubMed Identifier: 28705441
Funding acknowledgements
  • DFG: TRR173
  • BMBF: 05K12EF1
  • BMBF: 05K13UM1
  • BMBF: 05K13WMA
Open access
false
ISSN
0304-3991
Zeitschrift
Ultramicroscopy
Sprache
eng
Medium
Print-Electronic
Online publication date
2017
Paginierung
19 - 29
Datum der Veröffentlichung
2017
Status
Published
Datum der Datenerfassung
2017
Titel
Spin-filtered time-of-flight k-space microscopy of Ir - Towards the "complete" photoemission experiment.
Sub types
  • Research Support, Non-U.S. Gov't
  • Journal Article
Ausgabe der Zeitschrift
183

Datenquelle: Europe PubMed Central

Abstract
The combination of momentum microscopy (high resolution imaging of the Fourier plane) with an imaging spin filter has recently set a benchmark in k-resolution and spin-detection efficiency. Here we show that the degree of parallelization can be further increased by time-of-flight energy recording. On the quest towards maximum information (in earlier work termed "complete" photoemission experiment) we have studied the prototypical high-Z fcc metal iridium. Large partial bandgaps and strong spin-orbit interaction lead to a sequence of spin-polarized surface resonances. Soft X-rays give access to the 4D spectral density function ρ (EB,kx,ky,kz) weighted by the photoemission cross section. The Fermi surface and all other energy isosurfaces, Fermi velocity distribution vF(kF), electron or hole conductivity, effective mass and inner potential can be obtained from the multi-dimensional array ρ by simple algorithms. Polarized light reveals the linear and circular dichroism texture in a simple manner and an imaging spin filter exposes the spin texture. One-step photoemission calculations are in fair agreement with experiment. Comparison of the Bloch spectral function with photoemission calculations uncovers that the observed high spin polarization of photoelectrons from bulk bands originates from the photoemission step and is not present in the initial state.
Date of acceptance
2017
Autoren
  • G Schönhense
  • K Medjanik
  • S Chernov
  • D Kutnyakhov
  • O Fedchenko
  • M Ellguth
  • D Vasilyev
  • A Zaporozhchenko-Zymaková
  • D Panzer
  • A Oelsner
  • C Tusche
  • B Schönhense
  • J Braun
  • J Minár
  • H Ebert
  • J Viefhaus
  • W Wurth
  • HJ Elmers
Autoren-URL
https://www.ncbi.nlm.nih.gov/pubmed/28705441
DOI
10.1016/j.ultramic.2017.06.025
eISSN
1879-2723
Zeitschrift
Ultramicroscopy
Sprache
eng
Country
Netherlands
Paginierung
19 - 29
PII
S0304-3991(17)30014-1
Datum der Veröffentlichung
2017
Status
Published
Datum, an dem der Datensatz öffentlich gemacht wurde
2018
Titel
Spin-filtered time-of-flight k-space microscopy of Ir - Towards the "complete" photoemission experiment.
Sub types
  • Journal Article
  • Research Support, Non-U.S. Gov't
Ausgabe der Zeitschrift
183

Datenquelle: PubMed

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