Evidence of temperature dependence of initial adsorption sites of Ge atoms on Si(111)-7×7 | Zendy

Z. A. Ansari | Zendy; Masahiko Tomitori | Zendy; Toyoko Arai | Zendy

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Evidence of temperature dependence of initial adsorption sites of Ge atoms on Si(111)-7×7

Author(s) -

Z. A. Ansari,

Masahiko Tomitori,

Toyoko Arai

Publication year - 2006

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2198109

Subject(s) - scanning tunneling microscope , adsorption , cluster (spacecraft) , germanium , crystallography , silicon , chemistry , atom (system on chip) , materials science , atomic physics , nanotechnology , physics , metallurgy , computer science , embedded system , programming language

Small amounts of Ge atoms are deposited on Si (111) -7×7 surfaces at room temperature (RT) and at 100 °C to clarify the initial adsorption sites using scanning tunneling microscopy. At RT Ge atoms are adsorbed at high coordination B2 sites around the rest atoms, as predicted by Cho and Kaxiras [Surf. Sci. 396, L261 (1998)]. On one hand, at 100 °C Ge atoms are adsorbed on corner adatom sites. With increasing Ge coverage the corner sites are gradually occupied, followed by Ge adsorption at center adatom sites, resulting in Ge cluster growth with a size of the half unit cell. © 2006 American Institute of Physics

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