UNUSUAL TI ADSORPTION ON SI(001) AND SUBSEQUENT ACTIVATION OF SI EJECTION
UNUSUAL TI ADSORPTION ON SI(001) AND SUBSEQUENT ACTIVATION OF SI EJECTION
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SI(001) 上不寻常的 TI 吸附以及随后激活 SI 喷射
DOI:
10.1103/physrevb.58.3549
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发表时间:
1998
影响因子:
3.7
通讯作者:
T. Ohno
中科院分区:
文献类型:
--
作者:
B. Yu;Y. Miyamoto;O. Sugino;T. Sasaki;T. Ohno
The epitaxy of Ti on Si (001) exhibits a profound intermixing of Ti and Si atoms giving rise to the formation of titanium silicide. This phenomenon differs considerably from typical epitaxial growth and is not understood. Using first-principles total-energy calculations we examined the reaction of a Ti adatom with a Si (001) surface. We found that the penetration of the Ti adatom into a near-surface interstitial site and the subsequent ejection of its neighboring surface Si atoms onto a terrace is kinematically favored with respect to the “normal” hopping diffusion on a Si surface. These reactive processes provide the microscopic mechanism of an initial stage of transition-metal silicidation.