Mapping band alignment across complex oxide heterointerfaces

Bo Chao Huang; Ya Ping Chiu; Po Cheng Huang; Wen Ching Wang; Vu Thanh Tra; Jan Chi Yang; Qing He; Jiunn Yuan Lin; Chia Seng Chang; Ying Hao Chu

doi:10.1103/PhysRevLett.109.246807

Mapping band alignment across complex oxide heterointerfaces

Bo Chao Huang, Ya Ping Chiu^*, Po Cheng Huang, Wen Ching Wang, Vu Thanh Tra, Jan Chi Yang, Qing He, Jiunn Yuan Lin, Chia Seng Chang, Ying Hao Chu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

67 Citations (Scopus)

Abstract

In this study, direct observation of the evolution of electronic structures across complex oxide interfaces has been revealed in the LaAlO ₃/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.

Original language	English
Article number	246807
Journal	Physical Review Letters
Volume	109
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevLett.109.246807
Publication status	Published - 2012 Dec 12
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.109.246807

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title = "Mapping band alignment across complex oxide heterointerfaces",

abstract = "In this study, direct observation of the evolution of electronic structures across complex oxide interfaces has been revealed in the LaAlO 3/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.",

author = "Huang, {Bo Chao} and Chiu, {Ya Ping} and Huang, {Po Cheng} and Wang, {Wen Ching} and Tra, {Vu Thanh} and Yang, {Jan Chi} and Qing He and Lin, {Jiunn Yuan} and Chang, {Chia Seng} and Chu, {Ying Hao}",

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doi = "10.1103/PhysRevLett.109.246807",

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AU - Huang, Bo Chao

AU - Chiu, Ya Ping

AU - Huang, Po Cheng

AU - Wang, Wen Ching

AU - Tra, Vu Thanh

AU - Yang, Jan Chi

AU - He, Qing

AU - Lin, Jiunn Yuan

AU - Chang, Chia Seng

AU - Chu, Ying Hao

PY - 2012/12/12

Y1 - 2012/12/12

N2 - In this study, direct observation of the evolution of electronic structures across complex oxide interfaces has been revealed in the LaAlO 3/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.

AB - In this study, direct observation of the evolution of electronic structures across complex oxide interfaces has been revealed in the LaAlO 3/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.

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Mapping band alignment across complex oxide heterointerfaces

Abstract

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