Direct 3D mapping of the Fermi surface and Fermi velocity

Publikationstyp:
Zeitschriftenaufsatz
Metadaten:
Autoren
  • K Medjanik
  • O Fedchenko
  • S Chernov
  • D Kutnyakhov
  • M Ellguth
  • A Oelsner
  • B Schonhense
  • TRF Peixoto
  • P Lutz
  • C-H Min
  • F Reinert
  • S Daster
  • Y Acremann
  • J Viefhaus
  • W Wurth
  • HJ Elmers
  • G Schonhense
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000402017000008&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1038/NMAT4875
eISSN
1476-4660
Externe Identifier
  • Clarivate Analytics Document Solution ID: EV8FV
  • PubMed Identifier: 28272500
ISSN
1476-1122
Ausgabe der Veröffentlichung
6
Zeitschrift
NATURE MATERIALS
Paginierung
615 - +
Datum der Veröffentlichung
2017
Status
Published
Titel
Direct 3D mapping of the Fermi surface and Fermi velocity
Sub types
  • Article
Ausgabe der Zeitschrift
16

Datenquelle: Web of Science (Lite)

Andere Metadatenquellen:
Autoren
  • K Medjanik
  • O Fedchenko
  • S Chernov
  • D Kutnyakhov
  • M Ellguth
  • A Oelsner
  • B Schönhense
  • TRF Peixoto
  • P Lutz
  • C-H Min
  • F Reinert
  • S Däster
  • Y Acremann
  • J Viefhaus
  • W Wurth
  • HJ Elmers
  • G Schönhense
DOI
10.1038/nmat4875
eISSN
1476-4660
ISSN
1476-1122
Ausgabe der Veröffentlichung
6
Zeitschrift
Nature Materials
Sprache
en
Online publication date
2017
Paginierung
615 - 621
Datum der Veröffentlichung
2017
Status
Published
Herausgeber
Springer Science and Business Media LLC
Herausgeber URL
http://dx.doi.org/10.1038/nmat4875
Datum der Datenerfassung
2022
Titel
Direct 3D mapping of the Fermi surface and Fermi velocity
Ausgabe der Zeitschrift
16

Datenquelle: Crossref

Abstract
We performed a full mapping of the bulk electronic structure including the Fermi surface and Fermi-velocity distribution v<sub>F</sub>(k<sub>F</sub>) of tungsten. The 4D spectral function ρ(E<sub>B</sub>; k) in the entire bulk Brillouin zone and 6 eV binding-energy (E<sub>B</sub>) interval was acquired in ∼3 h thanks to a new multidimensional photoemission data-recording technique (combining full-field k-microscopy with time-of-flight parallel energy recording) and the high brilliance of the soft X-rays used. A direct comparison of bulk and surface spectral functions (taken at low photon energies) reveals a time-reversal-invariant surface state in a local bandgap in the (110)-projected bulk band structure. The surface state connects hole and electron pockets that would otherwise be separated by an indirect local bandgap. We confirmed its Dirac-like spin texture by spin-filtered momentum imaging. The measured 4D data array enables extraction of the 3D dispersion of all bands, all energy isosurfaces, electron velocities, hole or electron conductivity, effective mass and inner potential by simple algorithms without approximations. The high-Z bcc metals with large spin-orbit-induced bandgaps are discussed as candidates for topologically non-trivial surface states.
Addresses
  • Institut für Physik, Johannes Gutenberg-Universität, StaudingerWeg 7, 55128 Mainz, Germany.
Autoren
  • K Medjanik
  • O Fedchenko
  • S Chernov
  • D Kutnyakhov
  • M Ellguth
  • A Oelsner
  • B Schönhense
  • TRF Peixoto
  • P Lutz
  • C-H Min
  • F Reinert
  • S Däster
  • Y Acremann
  • J Viefhaus
  • W Wurth
  • HJ Elmers
  • G Schönhense
DOI
10.1038/nmat4875
eISSN
1476-4660
Externe Identifier
  • PubMed Identifier: 28272500
Open access
false
ISSN
1476-1122
Ausgabe der Veröffentlichung
6
Zeitschrift
Nature materials
Sprache
eng
Medium
Print-Electronic
Online publication date
2017
Paginierung
615 - 621
Datum der Veröffentlichung
2017
Status
Published
Datum der Datenerfassung
2017
Titel
Direct 3D mapping of the Fermi surface and Fermi velocity.
Sub types
  • Research Support, Non-U.S. Gov't
  • Journal Article
Ausgabe der Zeitschrift
16

Datenquelle: Europe PubMed Central

Abstract
We performed a full mapping of the bulk electronic structure including the Fermi surface and Fermi-velocity distribution vF(kF) of tungsten. The 4D spectral function ρ(EB; k) in the entire bulk Brillouin zone and 6 eV binding-energy (EB) interval was acquired in ∼3 h thanks to a new multidimensional photoemission data-recording technique (combining full-field k-microscopy with time-of-flight parallel energy recording) and the high brilliance of the soft X-rays used. A direct comparison of bulk and surface spectral functions (taken at low photon energies) reveals a time-reversal-invariant surface state in a local bandgap in the (110)-projected bulk band structure. The surface state connects hole and electron pockets that would otherwise be separated by an indirect local bandgap. We confirmed its Dirac-like spin texture by spin-filtered momentum imaging. The measured 4D data array enables extraction of the 3D dispersion of all bands, all energy isosurfaces, electron velocities, hole or electron conductivity, effective mass and inner potential by simple algorithms without approximations. The high-Z bcc metals with large spin-orbit-induced bandgaps are discussed as candidates for topologically non-trivial surface states.
Date of acceptance
2017
Autoren
  • K Medjanik
  • O Fedchenko
  • S Chernov
  • D Kutnyakhov
  • M Ellguth
  • A Oelsner
  • B Schönhense
  • TRF Peixoto
  • P Lutz
  • C-H Min
  • F Reinert
  • S Däster
  • Y Acremann
  • J Viefhaus
  • W Wurth
  • HJ Elmers
  • G Schönhense
Autoren-URL
https://www.ncbi.nlm.nih.gov/pubmed/28272500
DOI
10.1038/nmat4875
eISSN
1476-4660
Ausgabe der Veröffentlichung
6
Zeitschrift
Nat Mater
Sprache
eng
Country
England
Paginierung
615 - 621
PII
nmat4875
Datum der Veröffentlichung
2017
Status
Published
Titel
Direct 3D mapping of the Fermi surface and Fermi velocity.
Sub types
  • Journal Article
  • Research Support, Non-U.S. Gov't
Ausgabe der Zeitschrift
16

Datenquelle: PubMed

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