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

Journal Article · Fri Feb 01 00:00:00 EST 1980 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.327681· OSTI ID:5623685

Oshima, C; Aono, M; Tanaka, T; Nishitani, R; Kawai, S

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.

• Research Organization: National Institute for Research in Inorganic Materials, Namiki 1-1, Sakura, Niihari, Ibaraki, Japan 300-31
• OSTI ID: 5623685
• Journal Information: J. Appl. Phys.; (United States), Vol. 51:2
• Country of Publication: United States
• Language: English

Related Subjects

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