Formation of hill and valley structures on Si(001) vicinal surfaces studied by spot-profile-analyzing LEED
Formation of hill and valley structures on Si(001) vicinal surfaces studied by spot-profile-analyzing LEED
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通过点轮廓分析 LEED 研究 Si(001) 邻面上山丘和山谷结构的形成
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
M. H. Hoegen
中科院分区：
文献类型：
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作者：
H. Minoda;T. Shimakura;K. Yagi;F. M. Z. Heringdorf;M. H. Hoegen
Si~001上形成‘丘陵和山谷’结构！通过原位高分辨率低能电子衍射研究了伴随 Si~001!533.2-Au 重构形成的 Au 吸附引起的邻接表面。 “丘陵和山谷”结构由 ~001 组成！露台和〜119！平衡条件下的刻面与误切角度无关 ~0.5–8°！基材表面。这不依赖于样品处理，并且通过在室温沉积Au之后以及在高温沉积Au之后进行退火获得相似的结构。退火过程中的原位观察表明，先前观察到的533和A2633等相应的五重结构并未在Si~001上形成！该系统仅形成533.2结构。最初形成的双畴结构是在231和132平台上分别形成533.2和3.235畴，最终转变为单畴533.2结构，其中五倍方向平行于错切方向。
Formation of ‘‘hill-and-valley’’ structures on Si~001! vicinal surfaces induced by Au adsorption which accompanies formation of the Si~001!533.2-Au reconstruction, was studied by in situ high-resolution lowenergy electron diffraction. The ‘‘hill-and-valley’’ structures are composed of ~001! terraces and ~119! facets under the equilibrium condition independent of the miscut angle ~0.5–8°! of the substrate surfaces. This does not depend on sample treatments and the similar structures are obtained by annealing after Au deposition at room temperature as well as Au deposition at high temperature. In situ observation during annealing indicates that commensurate fivefold structures such as 533 and A2633 that were previously observed are not formed on the Si~001! surface and only the 533.2 structure is formed in this system. Double domain structures initially formed in such a way that the 533.2 and 3.235 domains are formed on the 231 and 132 terraces, respectively, finally transforms into single domain 533.2 structure where the fivefold direction is parallel to the miscut direction.