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Title: Low work function and surface structure of the LaB/sub 6/(210) surface studied by angle-resolved x-ray spectroscopy, ultraviolet spectroscopy, and low-energy electron diffraction

Abstract

A clean surface of LaB/sub 6/(210) exhibits the low work function of 2.2 +- 0.1 eV at room temperature. This is lower than those of the (100), (110), and (111) surfaces. Similarly to the (100) surface, La atoms exist in a (1 x 1) ordered structure at the outermost layer of the (210) clean surface. The value of the low work function of LaB/sub 6/ has been discussed on the basis of those data together with the Lang-Kohn theory. The changes of the (210) surface with oxygen chemisorption are more analogous to those of the (110) surface than the (100) and (111) surface. Work function changes from 2.2 to 3.1 eV with oxygen exposure and saturates above approx.15 L; the periodicity of the surface-atomic lattice disappears almost completely.

Authors:
; ; ; ;
Publication Date:
Research Org.:
National Institute for Research in Inorganic Materials, Namiki 1-1, Sakura, Niihari, Ibaraki, Japan 300-31
OSTI Identifier:
5623685
Resource Type:
Journal Article
Journal Name:
J. Appl. Phys.; (United States)
Additional Journal Information:
Journal Volume: 51:2
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; LANTHANUM BORIDES; SURFACE PROPERTIES; WORK FUNCTIONS; ATOMS; CHEMISORPTION; CRYSTAL STRUCTURE; DATA; ELECTRON DIFFRACTION; LAYERS; MEDIUM TEMPERATURE; ULTRAVIOLET SPECTRA; X-RAY SPECTROSCOPY; BORIDES; BORON COMPOUNDS; CHEMICAL REACTIONS; COHERENT SCATTERING; DIFFRACTION; INFORMATION; LANTHANUM COMPOUNDS; RARE EARTH COMPOUNDS; SCATTERING; SEPARATION PROCESSES; SORPTION; SPECTRA; SPECTROSCOPY; 360204* - Ceramics, Cermets, & Refractories- Physical Properties

Citation Formats

Oshima, C, Aono, M, Tanaka, T, Nishitani, R, and Kawai, S. Low work function and surface structure of the LaB/sub 6/(210) surface studied by angle-resolved x-ray spectroscopy, ultraviolet spectroscopy, and low-energy electron diffraction. United States: N. p., 1980. Web. doi:10.1063/1.327681.
Oshima, C, Aono, M, Tanaka, T, Nishitani, R, & Kawai, S. Low work function and surface structure of the LaB/sub 6/(210) surface studied by angle-resolved x-ray spectroscopy, ultraviolet spectroscopy, and low-energy electron diffraction. United States. https://doi.org/10.1063/1.327681
Oshima, C, Aono, M, Tanaka, T, Nishitani, R, and Kawai, S. 1980. "Low work function and surface structure of the LaB/sub 6/(210) surface studied by angle-resolved x-ray spectroscopy, ultraviolet spectroscopy, and low-energy electron diffraction". United States. https://doi.org/10.1063/1.327681.
@article{osti_5623685,
title = {Low work function and surface structure of the LaB/sub 6/(210) surface studied by angle-resolved x-ray spectroscopy, ultraviolet spectroscopy, and low-energy electron diffraction},
author = {Oshima, C and Aono, M and Tanaka, T and Nishitani, R and Kawai, S},
abstractNote = {A clean surface of LaB/sub 6/(210) exhibits the low work function of 2.2 +- 0.1 eV at room temperature. This is lower than those of the (100), (110), and (111) surfaces. Similarly to the (100) surface, La atoms exist in a (1 x 1) ordered structure at the outermost layer of the (210) clean surface. The value of the low work function of LaB/sub 6/ has been discussed on the basis of those data together with the Lang-Kohn theory. The changes of the (210) surface with oxygen chemisorption are more analogous to those of the (110) surface than the (100) and (111) surface. Work function changes from 2.2 to 3.1 eV with oxygen exposure and saturates above approx.15 L; the periodicity of the surface-atomic lattice disappears almost completely.},
doi = {10.1063/1.327681},
url = {https://www.osti.gov/biblio/5623685}, journal = {J. Appl. Phys.; (United States)},
number = ,
volume = 51:2,
place = {United States},
year = {Fri Feb 01 00:00:00 EST 1980},
month = {Fri Feb 01 00:00:00 EST 1980}
}