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

共 30 条

[1] Atomically flat SrO-terminated SrTiO3(001) substrate [J].

Bachelet, R. ;

Sanchez, F. ;

Palomares, F. J. ;

Ocal, C. ;

Fontcuberta, J. .

APPLIED PHYSICS LETTERS, 2009, 95 (14)

[2] Self-Assembly of SrTiO3(001) Chemical-Terminations: A Route for Oxide-Nanostructure Fabrication by Selective Growth [J].

Bachelet, R. ;

Sanchez, F. ;

Santiso, J. ;

Munuera, C. ;

Ocal, C. ;

Fontcuberta, J. .

CHEMISTRY OF MATERIALS, 2009, 21 (12) :2494-2498

[3] Direct patterning of functional interfaces in oxide heterostructures [J].

Banerjee, N. ;

Huijben, M. ;

Koster, G. ;

Rijnders, G. .

APPLIED PHYSICS LETTERS, 2012, 100 (04)

[4] Mapping the spatial distribution of charge carriers in LaAlO3/SrTiO3 heterostructures [J].

Basletic, M. ;

Maurice, J. -L. ;

Carretero, C. ;

Herranz, G. ;

Copie, O. ;

Bibes, M. ;

Jacquet, E. ;

Bouzehouane, K. ;

Fusil, S. ;

Barthelemy, A. .

NATURE MATERIALS, 2008, 7 (08) :621-625

[5] Dominant Mobility Modulation by the Electric Field Effect at the LaAlO3/SrTiO3 Interface [J].

Bell, C. ;

Harashima, S. ;

Kozuka, Y. ;

Kim, M. ;

Kim, B. G. ;

Hikita, Y. ;

Hwang, H. Y. .

PHYSICAL REVIEW LETTERS, 2009, 103 (22)

[6] Direct imaging of the coexistence of ferromagnetism and superconductivity at the LaAlO3/SrTiO3 interface [J].

Bert, Julie A. ;

Kalisky, Beena ;

Bell, Christopher ;

Kim, Minu ;

Hikita, Yasuyuki ;

Hwang, Harold Y. ;

Moler, Kathryn A. .

NATURE PHYSICS, 2011, 7 (10) :767-771

[7] Mobility and carrier density in materials with anisotropic conductivity revealed by van der Pauw measurements [J].

Bierwagen, O ;

Pomraenke, R ;

Eilers, S ;

Masselink, WT .

PHYSICAL REVIEW B, 2004, 70 (16) :1-6

[8] Anisotropic electrical transport properties of a two-dimensional electron gas at SrTiO3-LaAlO3 interfaces [J].

Brinks, P. ;

Siemons, W. ;

Kleibeuker, J. E. ;

Koster, G. ;

Rijnders, G. ;

Huijben, M. .

APPLIED PHYSICS LETTERS, 2011, 98 (24)

[9] Two-Dimensional Quantum Oscillations of the Conductance at LaAlO3/SrTiO3 Interfaces [J].

Caviglia, A. D. ;

Gariglio, S. ;

Cancellieri, C. ;

Sacepe, B. ;

Fete, A. ;

Reyren, N. ;

Gabay, M. ;

Morpurgo, A. F. ;

Triscone, J-M. .

PHYSICAL REVIEW LETTERS, 2010, 105 (23)

[10] Nanoscale control of an interfacial metal-insulator transition at room temperature [J].

Cen, C. ;

Thiel, S. ;

Hammerl, G. ;

Schneider, C. W. ;

Andersen, K. E. ;

Hellberg, C. S. ;

Mannhart, J. ;

Levy, J. .

NATURE MATERIALS, 2008, 7 (04) :298-302

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