TY - JOUR
T1 - Formation of ordered B structure on W(100)
AU - Tuli, Farhana Jesmin
AU - Peng, Guansong
AU - Hossain, Shahadat
AU - Ninomiya, Kakeru
AU - Ahmed, Rezwan
AU - Nakagawa, Takeshi
AU - Mizuno, Seigi
N1 - Funding Information:
This research was partially supported by Grants-in-Aid for Scientific Research ( KAKENHI ) (Nos. 25287077 and JP20K05329 ), F. J. T is supported by the IEI program ( Kyushu University ) and the Ministry of Education, Culture, Sports, Science, and Technology (MEXT). The computation was carried out using the computer resource offered under the category of General Projects by Research Institute for Information Technology, Kyushu University.
Funding Information:
This research was partially supported by Grants-in-Aid for Scientific Research (KAKENHI) (Nos. 25287077 and JP20K05329), F. J. T is supported by the IEI program (Kyushu University) and the Ministry of Education, Culture, Sports, Science, and Technology (MEXT). The computation was carried out using the computer resource offered under the category of General Projects by Research Institute for Information Technology, Kyushu University.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/11
Y1 - 2021/11
N2 - Adsorption of a metalloid, boron (B) on W(100) was investigated using low energy electron diffraction (LEED), X-ray photoelectron spectroscopy (XPS) and scanning tunneling microscopy (STM) in ultra-high vacuum (UHV) condition. W(100)-c(2 × 2)-B superstructure was formed by annealing at high temperature (1200 K). The best fit structure obtained from LEED analysis and STM observation manifested that B atom positioned at four-fold hollow site with the coverage of 0.5 ML, forming low B concentrated tungsten boride compound, W2B, on W(100) surface. The W atoms beneath B atoms moved downward to form B-W bonds for stabilizing the surface atoms. XPS confirmed B 1s peak shifting towards lower binding energy compared to pure B 1s, which indicated the charge transfer from W to B. No ordered structures other than c(2 × 2) have been observed with the increase of B, which indicates that B atoms diffuse into bulk, not forming ordered B sheets, due to the low diffusion barrier into bulk by annealing.
AB - Adsorption of a metalloid, boron (B) on W(100) was investigated using low energy electron diffraction (LEED), X-ray photoelectron spectroscopy (XPS) and scanning tunneling microscopy (STM) in ultra-high vacuum (UHV) condition. W(100)-c(2 × 2)-B superstructure was formed by annealing at high temperature (1200 K). The best fit structure obtained from LEED analysis and STM observation manifested that B atom positioned at four-fold hollow site with the coverage of 0.5 ML, forming low B concentrated tungsten boride compound, W2B, on W(100) surface. The W atoms beneath B atoms moved downward to form B-W bonds for stabilizing the surface atoms. XPS confirmed B 1s peak shifting towards lower binding energy compared to pure B 1s, which indicated the charge transfer from W to B. No ordered structures other than c(2 × 2) have been observed with the increase of B, which indicates that B atoms diffuse into bulk, not forming ordered B sheets, due to the low diffusion barrier into bulk by annealing.
KW - Boron
KW - Low energy diffraction
KW - Scanning tunneling microscopy
KW - Surface structure
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U2 - 10.1016/j.susc.2021.121906
DO - 10.1016/j.susc.2021.121906
M3 - Article
AN - SCOPUS:85111261007
SN - 0039-6028
VL - 713
JO - Surface Science
JF - Surface Science
M1 - 121906
ER -