Mapping Band Alignment across Complex Oxide Heterointerfaces

被引：67

作者：

Huang, Bo-Chao ^{[1
]}

Chiu, Ya-Ping ^{[1
]}

Huang, Po-Cheng ^{[1
]}

Wang, Wen-Ching ^{[1
]}

Vu Thanh Tra ^{[2
]}

Yang, Jan-Chi ^{[3
]}

He, Qing ^{[4
]}

Lin, Jiunn-Yuan ^{[2
]}

Chang, Chia-Seng ^{[5
]}

Chu, Ying-Hao ^{[3
]}

机构：

[1] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 804, Taiwan

[2] Natl Chiao Tung Univ, Inst Phys, Hsinchu 300, Taiwan

[3] Natl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan

[4] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[5] Acad Sinica, Inst Phys, Taipei 105, Taiwan

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 24期

关键词：

TUNNELING SPECTROSCOPY; HETEROSTRUCTURES; TITANATE; LAALO3;

D O I：

10.1103/PhysRevLett.109.246807

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this study, direct observation of the evolution of electronic structures across complex oxide interfaces has been revealed in the LaAlO3/SrTiO3 model system using cross-sectional scanning tunneling microscopy and spectroscopy. The conduction and valence band structures across the LaAlO3/SrTiO3 interface are spatially resolved at the atomic level by measuring the local density of states. This study directly maps out the electronic reconstructions and a built-in electric field in the polar LaAlO3 layer. Results also clearly reveal the band bending and the notched band structure in the SrTiO3 adjacent to the interface. DOI: 10.1103/PhysRevLett.109.246807

引用

页数：5

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