Atomic-Site-Specific Surface Valence-Band Structure from X-Ray Standing-Wave Excited Photoemission

Yanna Chen, Leighton O. Jones, Tien Lin Lee, Anusheela Das, Martín A. Mosquera, Denis T. Keane, George C. Schatz, and Michael J. Bedzyk
Phys. Rev. Lett. 128, 206801 – Published 17 May 2022

Abstract

X-ray standing-wave (XSW) excited photoelectron emission was used to measure the site-specific valence band (VB) for ½ monolayer (ML) Pt grown on a SrTiO3 (001) surface. The XSW induced modulations in the core level (CL), and VB photoemission from the surface and substrate atoms were monitored for three hkl substrate Bragg reflections. The XSW CL analysis shows the Pt to have a face-centered-cubic-like cube-on-cube epitaxy with the substrate. The XSW VB information compares well to a density functional theory calculated projected density of states from the surface and substrate atoms. Overall, this Letter represents a novel method for determining the contribution to the density of states by valence electrons from specific atomic surface sites.

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  • Received 30 September 2021
  • Accepted 6 April 2022

DOI:https://doi.org/10.1103/PhysRevLett.128.206801

© 2022 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Yanna Chen1, Leighton O. Jones2, Tien Lin Lee3, Anusheela Das1, Martín A. Mosquera4, Denis T. Keane1, George C. Schatz2, and Michael J. Bedzyk1,5,*

  • 1Department of Materials Science and Engineering, Northwestern University, Illinois 60208, USA
  • 2Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA
  • 3Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom
  • 4Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, USA
  • 5Department of Physics and Astronomy, Northwestern University, Illinois 60208, USA

  • *Corresponding author. bedzyk@northwestern.edu

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Issue

Vol. 128, Iss. 20 — 20 May 2022

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