FERROELECTRIC RELAXATION OF THE SRTIO3(100) SURFACE
FERROELECTRIC RELAXATION OF THE SRTIO3(100) SURFACE
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DOI：
10.1103/physrevlett.62.2009
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发表时间：
1989-04-24
影响因子：
8.6
通讯作者：
MULLER, K
中科院分区：
文献类型：
--
作者：
BICKEL, N;SCHMIDT, G;MULLER, K
用低能电子衍射分析了120K时SrTiO3（100）的表面结构。最好的理论实验拟合结果的表面包含域的两个不同的层终端。它们都显示出第一层起皱，其中氧离子被拉出表面s（Ti）= 0.08 A/cm和s（Sr）= 0.16 A/cm，并结合前两层距离的弛豫。这证明了表面是铁电体不同的本体属性与理论预测一致。
The surface structure of SrTiO 3 (100) was analyzed at T= 120 K by means of low-energy-electron diffraction. The best theory-experiment fit results for a surface containing domains of two different layer terminations. Both of them show a first-layer puckering with oxygen ions being pulled out of the surface by s (Ti)= 0.08 Å and s (Sr)= 0.16 Å combined with a relaxation of the first two layer distances. This proves the surface to be ferroelectric different from the bulk property in agreement with theoretical predictions.