Electron Transfer and Ionic Displacements as the Origin of the 2D Electron Gas at the LAO/STO Interface: Direct Measurements with Atomic-Column Spatial Resolution

被引：134

作者：

Cantoni, Claudia ^{[1
]}

Gazquez, Jaume ^{[1
,2
]}

Granozio, Fabio Miletto ^{[3
,4
]}

Oxley, Mark P. ^{[1
]}

Varela, Maria ^{[1
]}

Lupini, Andrew R. ^{[1
]}

Pennycook, Stephen J. ^{[1
]}

Aruta, Carmela ^{[3
,4
]}

di Uccio, Umberto Scotti ^{[3
,4
]}

Perna, Paolo ^{[3
,4
]}

Maccariello, Davide ^{[3
,4
]}

机构：

[1] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

[2] Univ Complutense Madrid, E-28040 Madrid, Spain

[3] Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy

[4] Univ Naples Federico II, CNR SPIN, I-80126 Naples, Italy

来源：

ADVANCED MATERIALS | 2012年 / 24卷 / 29期

基金：

欧洲研究理事会;

关键词：

TRANSITION-METAL OXIDES; NEAR-EDGE STRUCTURES; X-RAY-ABSORPTION; SRTIO3/LAALO3; INTERFACES; CONDUCTIVITY; SPECTRA; CHARGE; SRTIO3;

D O I：

10.1002/adma.201200667

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Using state-of-the-art, aberration-corrected scanning transmission electron microscopy and electron energy loss spectroscopy with atomic-scale spatial resolution, experimental evidence for an intrinsic electronic reconstruction at the LAO/STO interface is shown. Simultaneous measurements of interfacial electron density and system polarization are crucial for establishing the highly debated origin of the 2D electron gas. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：3952 / 3957

页数：6

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