Ferroelectric relaxation of the(100) surface
- 24 April 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 62 (17), 2009-2011
- https://doi.org/10.1103/physrevlett.62.2009
Abstract
The surface structure of (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.
Keywords
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