Charge compensation by long-period reconstruction in strongly polar lithium niobate surfaces

被引：25

作者：

Sanna, S. ^{[1
]}

Rode, S. ^{[2
]}

Hoelscher, R. ^{[1
]}

Klassen, S. ^{[2
]}

Marutschke, C. ^{[2
]}

Kobayashi, K. ^{[3
]}

Yamada, H. ^{[3
]}

Schmidt, W. G. ^{[1
]}

Kuehnle, A. ^{[2
]}

机构：

[1] Univ Paderborn, Lehrstuhl Theoret Phys, D-33095 Paderborn, Germany

[2] Johannes Gutenberg Univ Mainz, Fachbereich Chem, Inst Phys Chem, D-55099 Mainz, Germany

[3] Kyoto Univ, Dept Elect Sci & Engn, Nishikyo Ku, Kyoto 6158510, Japan

来源：

PHYSICAL REVIEW B | 2013年 / 88卷 / 11期

关键词：

POLARIZATION; SCATTERING; LINBO3;

D O I：

10.1103/PhysRevB.88.115422

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microscopic structure of the polar (000 (1) over bar) and (0001) surfaces of lithium niobate is investigated by atomic-resolution frequency modulation atomic force microscopy and first-principles calculations. It is found that the surface reconstructs at annealing temperatures sufficiently high to drive off external adsorbates. In particular a (root 7 x root 7)R19.1 degrees reconstruction is found for the (000 (1) over bar) surface. Density-functional theory calculations show that-apart from the (root 7 x root 7)-a series of adatom-induced surface reconstructions exist that lower the surface energy and reduce the surface charge.

引用

页数：5

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