Surface potential of a polar oxide film: FeO on Pt(111)

被引：112

作者：

Rienks, EDL ^{[1
]}

Nilius, N ^{[1
]}

Rust, HP ^{[1
]}

Freund, HJ ^{[1
]}

机构：

[1] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.71.241404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied a thin FeO film on Pt(111) using scanning tunneling microscopy. The corrugation of the Moire pattern, that arises due to a lattice mismatch between the oxide film and the substrate, is found to increase dramatically when the microscope is operated in the field-emission regime. This contrast enhancement can be attributed to variations in the energy at which field-emission resonances are observed. We assign this effect to variations of the surface potential within the Moire unit cell. Using a simple electrostatic model we show that in this oxide film with polar termination, such variations can be induced by very subtle differences in geometry.

引用

页数：4

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