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; Michael J. Bedzyk

doi:10.1103/PhysRevLett.128.206801

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, Michael J. Bedzyk^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

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.

Original language	English (US)
Article number	206801
Journal	Physical review letters
Volume	128
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.128.206801
State	Published - May 20 2022

Funding

This work was primarily supported by the Northwestern University (NU) Institute of Catalysis in Energy Processes which is funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award No. DE-FG02-03ER15457. We thank Diamond Light Source for access to beamline I09 (Proposal No. SI20076) where the data was collected. We thank Dave McCue and Pardeep Khakur for assistance at I09. We thank Jorg Zegenhagen and Ivan Varntanyants for a helpful discussion. We thank D. Bruce Buchholz for help in using the PLD facility supported by the NU-MRSEC. Preliminary measurements were made at DND-CAT at the Advanced Photon Source (APS) supported by DuPont, Northwestern University (NU), and Dow Chemical. Argonne National Lab is supported by DOE Grant No. DE-AC02-06CH11357. This research was supported in part by the computational resources and staff contributions provided by the Quest High Performance Computing Facility at NU, which is jointly supported by the Office of the Provost, the Office for Research, and NU Information Technology. This work made use of the XRD, PLD, and Keck-II facilities at NU supported by the MRSEC program (NSF DMR-1720139), Keck Foundation, State of Illinois, and the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205).

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.128.206801

Cite this

@article{98f79aa39ecc4ab6840c9d97b5882d68,

title = "Atomic-Site-Specific Surface Valence-Band Structure from X-Ray Standing-Wave Excited Photoemission",

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.",

author = "Yanna Chen and Jones, {Leighton O.} and Lee, {Tien Lin} and Anusheela Das and Mosquera, {Mart{\'i}n A.} and Keane, {Denis T} and Schatz, {George C.} and Bedzyk, {Michael J.}",

note = "Funding Information: This work was primarily supported by the Northwestern University (NU) Institute of Catalysis in Energy Processes which is funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award No. DE-FG02-03ER15457. We thank Diamond Light Source for access to beamline I09 (Proposal No. SI20076) where the data was collected. We thank Dave McCue and Pardeep Khakur for assistance at I09. We thank Jorg Zegenhagen and Ivan Varntanyants for a helpful discussion. We thank D. Bruce Buchholz for help in using the PLD facility supported by the NU-MRSEC. Preliminary measurements were made at DND-CAT at the Advanced Photon Source (APS) supported by DuPont, Northwestern University (NU), and Dow Chemical. Argonne National Lab is supported by DOE Grant No. DE-AC02-06CH11357. This research was supported in part by the computational resources and staff contributions provided by the Quest High Performance Computing Facility at NU, which is jointly supported by the Office of the Provost, the Office for Research, and NU Information Technology. This work made use of the XRD, PLD, and Keck-II facilities at NU supported by the MRSEC program (NSF DMR-1720139), Keck Foundation, State of Illinois, and the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205). Publisher Copyright: {\textcopyright} 2022 American Physical Society.",

year = "2022",

month = may,

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doi = "10.1103/PhysRevLett.128.206801",

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AU - Mosquera, Martín A.

AU - Keane, Denis T

AU - Schatz, George C.

AU - Bedzyk, Michael J.

N1 - Funding Information: This work was primarily supported by the Northwestern University (NU) Institute of Catalysis in Energy Processes which is funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award No. DE-FG02-03ER15457. We thank Diamond Light Source for access to beamline I09 (Proposal No. SI20076) where the data was collected. We thank Dave McCue and Pardeep Khakur for assistance at I09. We thank Jorg Zegenhagen and Ivan Varntanyants for a helpful discussion. We thank D. Bruce Buchholz for help in using the PLD facility supported by the NU-MRSEC. Preliminary measurements were made at DND-CAT at the Advanced Photon Source (APS) supported by DuPont, Northwestern University (NU), and Dow Chemical. Argonne National Lab is supported by DOE Grant No. DE-AC02-06CH11357. This research was supported in part by the computational resources and staff contributions provided by the Quest High Performance Computing Facility at NU, which is jointly supported by the Office of the Provost, the Office for Research, and NU Information Technology. This work made use of the XRD, PLD, and Keck-II facilities at NU supported by the MRSEC program (NSF DMR-1720139), Keck Foundation, State of Illinois, and the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205). Publisher Copyright: © 2022 American Physical Society.

PY - 2022/5/20

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N2 - 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.

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

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