| 低As压退火对GaAs(001)表面形貌与重构的影响 |
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| 引用本文： | 周勋,罗子江,王继红,郭祥,丁召.低As压退火对GaAs(001)表面形貌与重构的影响[J].物理学报,2015,64(21):216803-216803. |
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| 作者姓名： | 周勋 罗子江 王继红 郭祥 丁召 |
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| 作者单位： | 1. 贵州师范大学物理与电子科学学院, 贵阳 550001;2. 贵州财经大学教育管理学院, 贵阳 550004;3. 贵州大学理学院, 贵阳 550025 |
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| 基金项目： | 国家自然科学基金(批准号: 61564002)、教育部博士点基金(批准号: 20105201110003)、 贵州师范大学2012年博士基金、2013年度贵州财经大学引进人才科研项目(批准号: [2013]2114) 和贵州省科学技术基金项目(批准号: 黔科合J字[2011]2095号)资助的课题. |
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| 摘 要： | 在低As压条件下退火处理原子级平坦的GaAs(001) βup 2(2×4)重构表面. 利用扫描隧道显微镜对表面进行研究, 发现随着低As压退火时间的延长, 表面形貌与表面重构的演变同步进行. 表面形貌经历了从有序平坦转变为无序平坦, 然后逐渐恢复到有序平坦状态的过程. 表面重构则由βup 2(2×4)重构逐渐转变为(2×6)重构, 然后再转变为锯齿状的(2×6)重构, 并且表面形貌与表面重构的演变存在一定的相互关系.
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| 关 键 词： | 表面形貌 表面重构 预粗糙 (2×6)重构 |
| 收稿时间： | 2015-04-06 |
Effect of low As pressure annealing on the morphology and reconstruction of GaAs (001) |
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| Zhou Xun,Luo Zi-Jiang,Wang Ji-Hong,Guo Xiang,Ding Zhao.Effect of low As pressure annealing on the morphology and reconstruction of GaAs (001)[J].Acta Physica Sinica,2015,64(21):216803-216803. |
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| Authors: | Zhou Xun Luo Zi-Jiang Wang Ji-Hong Guo Xiang Ding Zhao |
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| Institution: | 1. School of Physics and Electronics Science, Guizhou Normal University, Guiyang 550001, China;2. School of Education Administration, Guizhou University of Finance and Economics, Guiyang 550004, China;3. College of Science, Guizhou University, Guiyang 550025, China |
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| Abstract: | In the low As beam equivalent pressure condition, the in-situ annealing treatment is carried out for the previously atomically flat GaAs(001) βup 2(2×4) reconstruction surface. Utilizing scanning tunneling microscopy, the surface is found to change its morphology simultaneously with the surface reconstruction during the increase of low As beam equivalent pressure annealing time. The surface morphology undergos from ordered flat to disordered flat and then gradually returns to the ordered flat state again. The surface reconstruction turns from βup 2(2×4) to (2×6) and then changes to “zig-zag” (2×6) state. And there is a correlation between the evolution of the surface morphology and surface reconstruction. |
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| Keywords: | surface morphology surface reconstruction pre-roughening (2×6) reconstruction |
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