Electronic conductivity and structural distortion at the interface between insulators SrTiO3and LaAlO3

被引：57

作者：

Maurice, J. -L.

Carretero, C.

Casanove, M. -J.

Bouzehouane, K.

Guyard, S.

Larquet, E.

Contour, J. -P.

机构：

[1] CNRS Thales, Unite Mixte Phys, F-91767 Palaiseau, France

[2] CNRS, CEMES, F-31055 Toulouse, France

[3] Univ Paris 06, IMPMC, F-75015 Paris, France

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2006年 / 203卷 / 09期

关键词：

D O I：

10.1002/pssa.200566033

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

When insulator LaAlO3 is grown by epitaxy onto a TiO2-terminated (1001 surface of insulator SrTiO3, the system obtained has a metallic character. This phenomenon has been associated with an electrostatic frustration at the interface, as {100} surfaces of SrTiO3 are neutral while those of LaAlO3 are polar, but its microscopic mechanism is not quite understood. Here, we present a structural characterisation of this interface by aberration-corrected transmission electron microscopy. The unit cells at the interface appear elongated: we discuss this distortion in terms of electrostatic charge and extra carriers at the interface. (c) 2006 WILEYNCH Verlag GmbH & Co. KGaA, Weinheim.

引用

收藏

页码：2209 / 2214

页数：6

相关论文

共 18 条

[1] POLAR HETEROJUNCTION INTERFACES [J].

HARRISON, WA ;

KRAUT, EA ;

WALDROP, JR ;

GRANT, RW .

PHYSICAL REVIEW B, 1978, 18 (08) :4402-4410

[2] Measurement of displacement and strain by high-resolution transmission electron microscopy [J].

Hÿtch, MJ .

STRESS AND STRAIN IN EPITAXY: THEORETICAL CONCEPTS, MEASUREMENTS AND APPLICATIONS, 2001, :201-219

[3] Stability of polyatomic molecules in degenerate electronic states. I. Orbital degeneracy [J].

Jahn, HA ;

Teller, E .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1937, 161 (A905) :220-235

[4] Atomic-resolution imaging of oxygen in perovskite ceramics [J].

Jia, CL ;

Lentzen, M ;

Urban, K .

SCIENCE, 2003, 299 (5608) :870-873

[5] Roles of the first atomic layers in growth of SrTiO3 films on LaAlO3 substrates [J].

Kim, DW ;

Kim, DH ;

Kang, BS ;

Noh, TW ;

Lee, DR ;

Lee, KB .

APPLIED PHYSICS LETTERS, 1999, 74 (15) :2176-2178

[6] Quasi-ideal strontium titanate crystal surfaces through formation of strontium hydroxide [J].

Koster, G ;

Kropman, BL ;

Rijnders, GJHM ;

Blank, DHA ;

Rogalla, H .

APPLIED PHYSICS LETTERS, 1998, 73 (20) :2920-2922

[7]

Marucco J.F., 2004, CHIMIE SOLIDES

[8] Interfaces in {100} epitaxial heterostructures of perovskite oxides [J].

Maurice, J. -L. ;

Imhoff, D. ;

Contoury, J. -P. ;

Colliex, C. .

PHILOSOPHICAL MAGAZINE, 2006, 86 (15) :2127-2146

[9] Strain relaxation in the epitaxy of La2/3Sr1/3MnO3 grown by pulsed-laser deposition on SrTiO3(001) [J].

Maurice, JL ;

Pailloux, F ;

Barthélémy, A ;

Durand, O ;

Imhoff, D ;

Lyonnet, R ;

Rocher, A ;

Contour, JP .

PHILOSOPHICAL MAGAZINE, 2003, 83 (28) :3201-3224

[10] Transmission electron microscopy of La0.67Sr0.33MnO3/SrTiO3/La0.67Sr0.33MnO3 heterostructures grown by pulsed laser deposition on (001) SrTiO3 [J].

Maurice, JL ;

Lyonnet, R ;

Contour, JP .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2000, 211 (1-3) :91-96