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]
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页数：5
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