Tuning the Structure of Ultrathin BaTiO3 Films on Me(001) (Me = Fe, Pd, Pt) Surfaces

被引：18
|
作者：
Meyerheim, H. L. [1 ]
Ernst, A. [1 ,5 ]
Mohseni, K. [1 ]
Maznichenko, I. V. [2 ]
Henk, J. [2 ]
Ostanin, S. [1 ]
Jedrecy, N. [3 ]
Klimenta, F. [1 ]
Zegenhagen, J. [4 ]
Schlueter, C. [4 ]
Mertig, I. [1 ,2 ]
Kirschner, J. [1 ,2 ]
机构：
[1] Max Planck Inst Mikrostrukturphys, D-06120 Halle, Germany
[2] Univ Halle Wittenberg, Inst Phys, D-06099 Halle, Germany
[3] UPMC Sorbonne Univ, Inst Nano Sci Paris, CNRS UMR7588, F-75005 Paris, France
[4] European Synchrotron Radiat Facil, F-38043 Grenoble, France
[5] Univ Leipzig, Wilhelm Ostwald Inst Phys & Theoret Chem, D-04103 Leipzig, Germany
来源：
PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 10期
关键词：
X-RAY-DIFFRACTION; TUNNEL-JUNCTIONS;
D O I：
10.1103/PhysRevLett.111.105501
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Using surface x-ray diffraction in combination with ab initio calculations, we demonstrate that the atomic structure of ultrathin BaTiO3 (BTO) films grown on Me(001) surfaces (Me = Fe, Pd, Pt) depends on subtle modifications of the interface chemical composition. A complete reversal of the surface termination from a BaO- [BTO on Fe(001)] to a TiO2-terminated film [BTO on Pt(001)] is observed which goes in parallel with the adsorption of submonolayer amounts of oxygen at metal hollow sites of the interface. Our results may suggest a new route to an overall control of both the surface and the interface geometry in BaTiO3/metal contacts.
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页数：5
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