Step Dynamics in 3D Crystal Shape Relaxation
Step Dynamics in 3D Crystal Shape Relaxation
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DOI：
10.1103/physrevlett.87.186102
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发表时间：
2001-10
影响因子：
8.6
通讯作者：
K. Thürmer;J. Reutt-Robey;E. Williams;M. Uwaha;A. Emundts;H. Bonzel
中科院分区：
文献类型：
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作者：
K. Thürmer;J. Reutt-Robey;E. Williams;M. Uwaha;A. Emundts;H. Bonzel
三维弛豫的小晶粒成像真实的时间使用变温扫描隧道显微镜。在500- 550 K温度范围内，微米级Pb微晶在Ru（0001）上达到平衡，当温度迅速降低到353- 423 K时，Pb微晶发生保体积形状弛豫。微晶顶部的（111）面通过单个原子层的连续剥离而生长，这些原子层像圆形岛屿一样收缩。当达到新的最终状态时，层剥离的速率显著减慢。
Three-dimensional relaxation of small crystallites was imaged in real time using variable-temperature scanning tunneling microscopy. The micron-sized Pb crystallites, supported on Ru(0001), were equilibrated at 500– 550 K, and the volume-preserving shape relaxation was induced by a rapid temperature decrease to 353– 423 K. The (111) facet at the top of the crystallite grows by sequential peeling of single atomic layers, which shrink like circular islands. The rate of layer peeling slows dramatically as a new final state is reached.