Laterally confined two-dimensional electron gases in self-patterned LaAlO3/SrTiO3 interfaces

被引：9

作者：

Foerster, M. ^{[1
]}

Bachelet, R. ^{[1
]}

Laukhin, V. ^{[1
,2
]}

Fontcuberta, J. ^{[1
]}

Herranz, G. ^{[1
]}

Sanchez, F. ^{[1
]}

机构：

[1] Inst Ciencia Mat Barcelona ICMAB CSIC, Bellaterra 08193, Catalonia, Spain

[2] ICREA, Barcelona 08010, Catalonia, Spain

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 23期

关键词：

OXIDE HETEROINTERFACE; SUPERCONDUCTIVITY; COEXISTENCE;

D O I：

10.1063/1.4728109

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A bottom-up process has been used to engineer the LaAlO3/SrTiO3 interface atomic composition and locally confine the two-dimensional electron gas to lateral sizes in the order of 100 nm. This is achieved by using SrTiO3(001) substrate surfaces with self-patterned chemical termination, which is replicated by the LaAlO3 layer, resulting in a modulated LaO/TiO2 and AlO2/SrO interface composition. We demonstrate the confinement of the conducting interface forming either long-range ordered nanometric stripes or isolated regions. Our results demonstrate that engineering the interface chemical termination is a suitable strategy towards nanoscale lateral confinement of two-dimensional high-mobility systems. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4728109]

引用

页数：5

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