TY - JOUR

T1 - Re-investigation of the Bi-induced Si(111)-(sqrt(3) × sqrt(3)) surfaces by low-energy electron diffraction

AU - Kuzumaki, Takuya

AU - Shirasawa, Tetsuroh

AU - Mizuno, Seigi

AU - Ueno, Nobuo

AU - Tochihara, Hiroshi

AU - Sakamoto, Kazuyuki

N1 - Funding Information:
Experimental support from S. Higashi is gratefully acknowledged. This work was financially supported by the JSPS Grant-in-Aid for Science Research (A) 20244045 , and the G-COE program of MEXT (G-03) .

PY - 2010/6/15

Y1 - 2010/6/15

N2 - The atomic structures of the Bi/Si(111)-(sqrt(3) × sqrt(3)) reconstructed surfaces obtained at different adsorbate coverages were studied by dynamical low-energy electron diffraction (LEED) I-V analysis. The experimentally obtained I-V curves of the β-Bi/Si(111)-(sqrt(3) × sqrt(3)) surface, which is formed by a Bi coverage of 1 ML, showed good agreement with the curves calculated for the milk stool model, a model proposed in the literature. In contrast to this result, the I-V curves of the α-phase obtained at a coverage of 1/3 ML do not agree with those reported in early LEED studies. We found that the I-V curves reported in the former LEED studies resemble closely to the results obtained for the surface on which the β and α-phases coexist. Based on the obtained I-V curves, we propose a more reliable structural model for the α-phase, and present the way to determine the presence of a high quality α-phase by using LEED.

AB - The atomic structures of the Bi/Si(111)-(sqrt(3) × sqrt(3)) reconstructed surfaces obtained at different adsorbate coverages were studied by dynamical low-energy electron diffraction (LEED) I-V analysis. The experimentally obtained I-V curves of the β-Bi/Si(111)-(sqrt(3) × sqrt(3)) surface, which is formed by a Bi coverage of 1 ML, showed good agreement with the curves calculated for the milk stool model, a model proposed in the literature. In contrast to this result, the I-V curves of the α-phase obtained at a coverage of 1/3 ML do not agree with those reported in early LEED studies. We found that the I-V curves reported in the former LEED studies resemble closely to the results obtained for the surface on which the β and α-phases coexist. Based on the obtained I-V curves, we propose a more reliable structural model for the α-phase, and present the way to determine the presence of a high quality α-phase by using LEED.

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U2 - 10.1016/j.susc.2010.03.022

DO - 10.1016/j.susc.2010.03.022

M3 - Article

AN - SCOPUS:77951258381

SN - 0039-6028

VL - 604

SP - 1044

EP - 1048

JO - Surface Science

JF - Surface Science

IS - 11-12

ER -