摘要: First-principles calculations for Pd(110)-1{times}1 and Pt(110)-1{times}1 slabs imply that the surface stress along close-packed, [1{bar 1}0] direction is larger than in [001] direction, transverse to channels. This agrees with simple idea relaxation of outermost layer separation, at a fcc(110) surface, allows nearest-neighbor bonds component channels relax toward their desired length, while channel walls cannot strain without reconstruction. In contrast, an analysis phonons Ni(110), based on empirical fit dynamical matrix, comes opposite conclusion, i.e., only half direction.
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