Surface stress of stepped chiral metal surfaces.
Surface stress of stepped chiral metal surfaces.
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DOI：
10.1103/physrevlett.102.026102
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发表时间：
2009-01
影响因子：
8.6
通讯作者：
M. Blanco-Rey;S. J. Pratt;S. Jenkins
中科院分区：
文献类型：
--
作者：
M. Blanco-Rey;S. J. Pratt;S. Jenkins
提出了利用表面应力作为物理探针来研究表面的手征效应。采用第一性原理计算了阶梯形非手性和手性bcc金属表面（Fe、Mo和W）的表面应力。当不存在镜像对称时，主应力方向是不受约束的;然而，我们发现应力沿沿着适当选择的球面区域平滑地变化。Fe的应力椭圆与Mo和W的应力椭圆不同，表明其表面应力具有不同的来源。
The use of surface stress as a physical probe for examining chiral effects in surfaces is proposed. First-principles calculations of the surface stress in stepped achiral and chiral bcc metal surfaces (Fe, Mo, and W) are presented. When no mirror symmetry is present, principal stress orientations are unconstrained; nevertheless, we find that the stress is smoothly varying along a suitably chosen stereographic zone of surfaces. Stress ellipses for Fe differ qualitatively from those of Mo and W, suggesting that its surface stress has a distinct origin.