Writing charge into the n-type LaAlO3/SrTiO3 interface: A theoretical study of the H2O kinetics on the top AlO2 surface

被引：7

作者：

Li, Feifei ^{[1
]}

Liang, Meng ^{[1
]}

Du, Wenli ^{[1
]}

Wang, Mei ^{[1
]}

Feng, Yexin ^{[1
]}

Hu, Zhenpeng ^{[1
]}

Zhang, Lixin ^{[1
]}

Wang, E. G. ^{[2
]}

机构：

[1] Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China

[2] Peking Univ, Sch Phys, Beijing 100871, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 25期

关键词：

TRANSITION;

D O I：

10.1063/1.4772499

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ab initio calculations reveal that H2O binds strongly with the AlO2-terminated LaAlO3(100) surface and stabilizes it. The H2O dissociates into OH and H. An ionic liquid is formed at certain temperature due to the fast diffusion of the H. The OH can then be selectively removed by a Coulomb force, resulting in the charge transfer to the interface. The desorption and diffusion of the remained H atoms are the key factors to the decay of the interface conductivity. While the desorption depends on the thickness of the LaAlO3 film, the diffusion is controlled by the coverage of H2O in a vacuum environment. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4772499]

引用

页数：4

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