Si(111)-(7x7) surface probed by reflection high-energy positron diffraction

被引：24

作者：

Kawasuso, A ^{[1
]}

Fukaya, Y ^{[1
]}

Hayashi, K ^{[1
]}

Maekawa, M ^{[1
]}

Okada, S ^{[1
]}

Ichimiya, A ^{[1
]}

机构：

[1] Japan Atom Energy Res Inst, Adv Sci Res Ctr, Gunma 3701292, Japan

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.68.241313

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the observation of reflection high-energy positron diffraction from a 7x7 reconstructed Si(111) surface with a well-collimated 20-kV positron beam. The diffraction pattern clearly exhibited the (1/7)-(3/7) order Laue zones in addition to the zeroth and first Laue zones. From the dynamical calculation of the rocking curve in the total reflection region, the vertical position of adatom layer was determined to be 1.52 A relative to the stacking fault layer. This value is greater than that predicted in the first-principles study suggesting a significant outward relaxation of adatoms.

引用

页数：4

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