Phys. Rev. Lett. 62, 2009–2011 (1989)Ferroelectric relaxation of the SrTiO3(100) surfaceReceived 7 February 1989; published in the issue dated 24 April 1989 The surface structure of SrTiO3(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. © 1989 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.62.2009
DOI:
10.1103/PhysRevLett.62.2009
PACS:
61.14.Hg, 61.50.Em, 77.80.-e
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